Both religions agree that God shares both transcendent and immanent qualities. How these religions resolve this issue is where the religions differ. Most of Christianity posits that God is a trinity; in this view God exists as three distinct persons which share a single divine essence, or substance. In those three there is one, and in that one there are three; the one God is indivisible, while the three persons are distinct and unconfused. Judaism sees God as a single entity, and views trinitarianism as both incomprehensible and a violation of the Bible's teaching that God is one. Christianity teaches that God became especially immanent in physical form through the Incarnation of Jesus, who is believed while on earth to be at once fully God and fully human. Judaism rejects the notion that Jesus or any physical object or being could be God, that God could be divisible in any way, or that God could be made to be joined to the material world in such fashion.

Some Jewish and Christian philosophers hold that due to these differences, it may well be that Jews and Christians don't believe in the same god at all. The majority Jewish view, codified in Jewish law, is that Christians do worship the same God that Jews do. The vast majority of Christians have always held that they worship the same God as the Jews.

All of the people Israel will come back to Torah; The people of Israel with be gathered back to the land of Israel; The Temple in Jerusalem will be rebuilt; Israel will live among the nations as an equal, and will be strong enough to defend herself; Eventually, war, hatred and famine will end, and an era of peace and prosperity will come upon the Earth.

Christians hold Jesus to be a different type of Messiah; the Savior. Although both read prophecies telling of his coming in the Bible, the two often read and interpret these same verses slightly differently. Jesus is believed to be the son of God in a literal sense, fully human, and simultaneously divine, fully God. In this view, Jesus is the Messiah, the son of God who offers salvation to all humans by his self-sacrifice, and who now sits in heaven at the right hand of God and will judge humanity in the end days. The liberation and peace brought by the messiah, in Christian terms, is primarily a spiritual peace and liberation; any political liberation is either seen as secondary or is not considered an issue at all.

Christian readings of the Hebrew Bible find hundreds of references to Jesus. This takes the form in some cases of specific prophesy, but in most cases of foreshadowing by types or forerunners. Christian  readings maintain that almost every passage was about not only the topic of the chapter as such, but is also about the coming of Jesus, if read according to such an interpretation. In this Christian view, the entire Old Testament Biblical is also a subtext about the coming of Jesus becoming more apparent over time.

Thus fundamentally in Judaism, one is enjoined to bring holiness into life (with the guidance of Gods laws), rather than removing oneself from life to be holy.

Much of Christianity also teaches that God wants people to perform good works, but all branches hold that good works will not lead to salvation. Some Christian denominations hold that salvation depends upon transformational faith in Jesus which expresses itself in good works as a testament (or witness) to ones faith for others to see (primarily Eastern Orthodox Christianity and Roman Catholicism), while others (including most Protestants) hold that faith alone is necessary for salvation. However, the difference is not as great as it seems, because it really hinges on the definition of "faith" used. The first group generally uses the term "faith" to mean "intellectual and heartfelt assent and submission." Such a faith will not be salvific until a person has allowed it to effect a life transforming conversion (turning towards God) in their being (see ontological faith). The Christians that hold to "salvation by faith alone" (also called by its Latin name "sola fide") define faith as being implicitly ontological--mere intellectual assent is not termed "faith" by these groups. Faith, then, is life-transforming by definition.

A practical outcome of this difference is the attitudes of the two religions to death bed conversions. According to most forms of classical Christianity, one may lead an evil life, but on one's death one may repent for one's sins, accept Jesus as Christian dogma teaches, and then that person will be rewarded with a heavenly afterlife by God; this will be the same heavenly paradise that a comparatively less sinful person would receive. In contrast, all forms of Judaism teach that God judges a person based on their whole lifetime of actions and beliefs, and that deathbed conversions are therefore meaningless and have minimal effect on God's view of their life.

Christianity categorizes sins into various groups. A wounding of the relationship with God is often called venial sin; a complete rupture of the relationship with God is often called mortal sin. Without salvation from sin (see below), a person's separation from God is permanent, causing such a person to enter Hell in the afterlife.

Original Sin is a slightly different concept in Christianity, it is not part of Jewish belief or philosophy. Original sin refers to the idea that the sin of Adam and Eve's disobedience (sin "at the origin") has passed on a spiritual heritage, so to speak. Christians teach that human beings inherit a corrupted or damaged human nature in which the tendency to do bad is greater than it would have been otherwise, so much so that human nature would not be capable now of participating in the afterlife with God. This is not a matter of being "guilty" of anything; each person is only personally guilty of their own actual sins. However, this understanding of original sin is what lies behind the Christian emphasis on the need for spiritual salvation from a spiritual Savior, who can forgive and set aside sin even though humans are not inherently pure and worthy of such salvation. St. Paul in Romans and First Corinthians placed special emphasis on this doctrine, and stressed that belief in Jesus would allow Christians to overcome death and attain salvation in the hereafter.

Roman Catholics, Eastern Orthodox Christians, and some Protestants teach the Sacrament of Baptism is the means by which each person's damaged human nature is healed and Sanctifying Grace (capacity to enjoy and participate in the spiritual life of God) is restored. This is referred to as "being born of water and the Spirit," following the terminology in the Gospel of St. John. Most Protestants believe this salvation grace comes about at the moment of personal decision to follow Jesus, and that Baptism is a symbol of the grace already received.

Judaism teaches that humans are born morally neutral; Jews have no concept of Original Sin, and do not accept it. Instead, Judaism affirms that people are born with a yetzer hatov, (literally, "the eye to good", in some views, a tendency towards goodness, in others, a tendency towards having a productive life and a tendency to be concerned with others) and with a yetzer hara, or concupiscence (literally "the eye to evil", in some views, a tendency towards evil, and in others, a tendency towards base or animal behavior and a tendency to be selfish.) Because sin is conceived for the most part in terms of a confused heart or wrongful actions, in Judaism it is believed, all human beings have free will and can choose the path in life that they will take. There is always a "way back" if a person wills it. (Although texts mention certain categories for whom the way back will be exceedingly hard, such as the slanderer, and the malicious person)

The rabbis recognize a positive value to the yetzer hara: one tradition identifies it with God's observation on the last day of creation that His accomplishment was "very good" (God's work on the preceding days was just described as "good") and explain that without the yetzer ha'ra there would be no marriage, children, commerce or other fruits of human labor; the implication is that yetzer ha'tov and yetzer ha'ra are best understood not as moral categories of good and evil but as selfless versus selfish orientations, either of which used rightly can serve God's will.

Or as Rabbi Hillel famously summarized the Jewish philosophy:

"If I am not for myself, who will be for me?

"But if I am not for others - what am I?

"And if not now [if I do not choose now], [then] when?

Another explanation of this is, without the existence of the yetzer ha'ra, there would be no merit earned in following God's commandments; choice is only meaningful if there has indeed been a choice made. So whereas creation was "good" before, it became "very good" when the evil inclination was added, for then it became possible to truly say that man could make a true choice to obey God's "mitzvot" (wishes or commandments). This is because Judaism views the following of God's ways as a desirable end in and of itself, rather than merely a means to obtain a personal goal such as afterlife.

Jews recognize two kinds of "sin," offenses against other people, and offenses against God. Offenses against God may be understood as violation of a contract (the covenant between God and the Children of Israel). Since the destruction of the Temple in Jerusalem, Jews have believed that right action (as opposed to right belief) is the way for a person to atone for one's sins. Midrash Avot de Rabbi Natan states the following:

One time, when Rabban Yochanan ben Zakkai was walking in Jerusalem with Rabbi Yehosua, they arrived at where the Temple now stood in ruins. "Woe to us" cried Rabbi Yehosua, "for this house where atonement was made for Israel's sins now lies in ruins!" Answered Rabban Yochanan, "We have another, equally important source of atonement, the practice of gemilut hasadim ("loving kindness"), as it is stated "I desire loving kindness and not sacrifice" (Hosea 6:6).

The Babylonian Talmud states:

Rabbi Yochanan and Rabbi Eleazar both explain that as long as the Temple stood, the altar atoned for Israel, but now, one's table atones [when the poor are invited as guests]. (Tractate Berachot, 55a.)

The liturgy of the Days of Awe (the High Holy Days; i.e. Rosh Hashanah and Yom Kippur) states that prayer, repentance and tzedakah (the dutiful giving of charity) atone for sin. But prayer cannot atone for wrongs done, without an honest sincere attempt to rectify any wrong done to the best of one's ability, and the sincere intention to avoid repetition. Atonement to Jews means to repent and set aside, and the word "T'shuvah" used for atonement actually means "to return". Judaism is optimistic in that it always sees a way that a determined person may return to what is good, and that God waits for that day too.

The Christian view is very well defined - every human is a sinner, and nothing but being saved by God's grace (and not through any merit of ones own actions) can change the damnatory sentence to salvation. There is a judgment after death, and Christ will return to judge the living and dead. Those positively judged will be saved and live in God's presence in heaven, those who are negatively judged will be cast to eternal hell (or in some versions, annihilated).

Jewish teaching is somewhat ambivalent on Judgment. Initially indeed there was no such concept in Judaism, however over time, and especially as exposed to other cultures' concept that every wrong must be somehow balanced by punishment in the end, and vice versa, a mixture of concepts and philosophies entered Judaism. At heart though, Jews do not look for an afterlife as a reward of motivation. The reward for a good life is simply the pleasure it gives God, and the rightness of doing ones duty and living a holy life in his ways. Little emphasis is given in Jewish life to the struggle for a place in the afterlife.

That said, in Jewish liturgy there is significant prayer and talk of a "book of life" that one is written into, a metaphorical allusion that God judges each person each year and possibly after death.

Many Jewish sages understand this to be metaphorical. For example - one Day of Atonement prayer says it will be decided "who will be made strong, and who weak, who will have good health, who poor, who will be at peace and who not at peace... but prayer pentitence and charity avert a stern decree". However others translate this to mean, by ones decisions to change oneself, it will become inevitable who will do good and create peace in the coming year, and who will do ill and create lack of peace, and so on.

Catholic views
Catholicism traditionally taught that "there is no salvation outside the Church", which some, particularly Fr. Feeny in the 19th century, interpreted as saying only Catholics can be saved. However, the Catholic Church's position is a bit more nuanced than that. The Catholic Church teaches that God's intended way of saving the human race is through the Catholic Church, and there is no source of saving grace which is not already contained within the Church. It should be noted that in this sense, any church founded on Peter's rock, may properly be called a "Catholic" Church - Roman Catholic is but one of these though the largest. At the same time, it does not deny the possibility that those not visibly members of the Church may attain salvation as well. Jesus is the path of salvation, and whilst some know they are on that path others can travel the same Way without knowing the name of the street they are on. In recent times, this teaching has been most notably expressed in the encyclicals Singulari Quidem (1856), Quanto Conficiamur Moerore (1863) and Dominus Iesus (2000). The latter document has taken criticism for claiming that non-Christians are in a "gravely deficient situation" as compared to Catholics.

Pope John Paul II on October 2 of 2000 emphasized that this document did not say that non-Christians were actively denied salvation: "...this confession does not deny salvation to non-Christians, but points to its ultimate source in Christ, in whom man and God are united". The Pope then, on December 6, issued a statement to further emphasize that the Church continued to support its traditional stance that salvation was available to believers of other faiths: "The gospel teaches us that those who live in accordance with the Beatitudes--the poor in spirit, the pure of heart, those who bear lovingly the sufferings of life--will enter God's kingdom." He further added, "All who seek God with a sincere heart, including those who do not know Christ and his church, contribute under the influence of Grace to the building of this Kingdom." On August 13, 2002, American Catholic bishops issued a joint statement with leaders of Reform and Conservative Judaism, called "Reflections on Covenant and Mission", which affirmed that Christians should not target Jews for conversion. The document stated: "Jews already dwell in a saving covenant with God" and "Jews are also called by God to prepare the world for God's Kingdom." However, some U.S.-led Baptist and other fundamentalist denominations still believe it is their duty to engage in what they refer to as outreach to "unbelieving" Jews (see Jews for Jesus).

Many Orthodox theologians believe that all people will have an opportunity to embrace union with God, including Jesus, after their death, and so become part of the Church at that time. God is thought to be good, just, and merciful; it would not seem just to condemn someone because they never heard the Gospel message, or were taught a distorted version of the Gospel by heretics. Therefore, the reasoning goes, they must at some point have an opportunity to make a genuine informed decision. Ultimately, those who persist in rejecting God condemn themselves, by cutting themselves off from the ultimate source of all Life, and from the God who is Love embodied. Jews, Muslims and members of other faiths, then, are expected to convert to Christianity in the afterlife. The Church of Jesus Christ of Latter-day Saints also holds this belief, and holds baptismal services in which righteous people are baptized in behalf of their ancestors who, it is believed, are given the opportunity to accept the ordinance.

Judaism teaches that all gentiles can receive a share in "the world to come". This is codified in the Mishna Avot 4:29, the Babylonian Talmud in tractates Avodah Zarah 10b, and Ketubot 111b, and in Maimonides's 12th century law code, the Mishneh Torah, in Hilkhot Melachim (Laws of Kings) 8.11.

Judaism has no strong tradition of offenses being punished by eternal damnation (the Hebrew Bible itself has very few references to any afterlife, and the word Sheol that is often translated as "Hell" is as often as not simply translated as "the grave"). Some violations (e.g. suicide) would be punished by separation from the community (e.g. not being buried in a Jewish cemetery).

Judaism's view is summed up by a biblical observation about the Torah: in the beginning God clothes the naked (Adam), and at the end God buries the dead (Moses). The Children of Israel mourned for 40 days - then got on with their lives. No reference is made in the Torah to anything beyond, and this is true even for Moses of whom it is said "nobody has arisen like him, who knew God face to face".

The Biblical conception of God is that his covenant is with the Jewish people, not individual Jews. In the context of this covenant, the death of individual Jews is inconsequential and various older Biblical passages suggest that individual death is final. It is the continued existence of the Jewish nation that is emphasized and the way that a human life should be led. With the rise of Hellenistic (Greco-Roman) thinking, and later the rise of Christianity, Jews became more concerned with the problem of individual death and an afterlife. The Pharisees, and then the Rabbis, made it an essential element of their faith that upon the arrival of the messiah the dead shall be resurrected. This is still a central belief in Orthodox Judaism and to a lesser extent in other branches of Judaism. A crucial difference between Jewish and Christian beliefs is that Jews believe it is the body that is resurrected. The "soul" or "spirit" has no life or meaning independent of a living body.

The only statements in the Tanakh (Hebrew Bible, Protestant Old Testament) about the status of a fetus state that killing an infant does not have the same status as killing a born human being, and mandates a much lesser penalty (a fine); it should be added that the instance cited in the Tanakh contemplates the accidental, rather than the deliberate, causing of an abortion.

The Oral Law states that the fetus is not yet a full human being until it has been born (either the head or the body is mostly outside of the mother), therefore killing a fetus is not murder, and abortion - in restricted circumstances - has always been legal under Jewish law. Rashi, the great 12th century commentator on the Bible and Talmud, states clearly of the fetus 'lav nefesh hu--it is not a person.' The Talmud contains the expression 'ubar yerech imo--the fetus is as the thigh of its mother,' i.e., the fetus is deemed to be part and parcel of the pregnant woman's body." Judaism prefers that such abortions, when necessary, take place before the first 40 days where the Babylonian Talmud Yevamot 69b states that: "the embryo is considered to be mere water until the fortieth day." Afterwards, it is considered subhuman until it is born. Christians who agree with these views may refer to this idea as abortion before the "quickening" of the soul by God in the fetus.

There are two additional passages in the Talmud which shed some light on the Jewish belief about abortion. They imply that the fetus is considered part of the mother, and not a separate entity:

* One section states that if a man purchases a cow that is found to be pregnant, then he is the owner both of the cow and the fetus.

* Another section states that if a pregnant woman converts to Judaism, that her conversion applies also to her fetus.

Rabbis also generally agree that abortions are not permitted on the grounds of genetic imperfections of the fetus, nor are they permitted for family planning or convenience reasons. Each case must be decided individually, however, and the decision should lie with the mother, father, and Rabbi.

Most branches of Christianity have historically held abortion to be murder of a human being, referring to Old Testament passages such as Psalm 139 and Jeremiah 1, as well as New Testament passages concerning both Jesus and John the Baptist while they were in utero. Also, the Didache, an early Church document, explicitly forbids abortion along with infanticide, both common practices in the Roman Empire, as murder. Many Protestant Christians claim that the Ten Commandments prohibit abortion under the heading of "Do not murder". Others reject this view, as they hold that the context of the entire set of Biblical laws includes those laws which restrict them to already born human beings.

The Jewish Bible is comprised of three parts:

* The Torah - the five books of Moses

* Nevi'im - the writings of the Prophets, and

* Ketuvim - other writings canonised over time, such as the Books of Esther, Jonah, Ruth or Job.

Collectively, these are known as the Tanakh, a Hebrew acronym for the first letters of each. Rabbinical Judaism traditionally believes that these written works were also accompanied by an oral tradition which taught how to perform commandments that are not stated explicitly in the Torah (i.e. what a Menorah looks like and what is meant by "Frontlets" in the Shema), and that it was revealed to Moses at Sinai and passed down through generations and eventually written down in the Talmud (see below).

Within the Torah, Jews find 613 Mitzvot (formal divine commandments), of which some are positive obligations, and others negatives to that must be avoided. These form the basis of their understanding of the law. The in-depth examination to understand the commandments and their true significance forms a major thread within the Talmud and other Jewish writings.

Jews do not accept the "New Testament" (nor do they accept the characterization of their sacred texts as an "Old Testament"); they do accept as sacred certain texts that are not included in the Tanakh especially the Mishnah, which was written down around 200 C.E., and a Babylonian and a Jerusalem Talmud, which were edited around 600 C.E. and 350 C.E., respectively. Many Jews believe that these texts were revealed to Moses at Mt. Sinai, that the Torah was written and that the teachings of the Talmud were transmitted orally. Since the transcription of the Talmud, notable rabbis have compiled law codes that are generally held in high regard: the Mishnah Torah, the Tur, and the Shulchan Aruch, which is generally held to be authoritative by Orthodox Jews. The Zohar, which was written in the thirteenth century, is generally held as the most important mystical treatise of the Jews.

Many Jews see Christians as having quite an ambivalent view of the Torah (or Old Testament as it is known to Christians), on the one hand it is God's absolute word, on the other hand at times treating commandments very selectively. As it seems to some Jews, Christians cite from the Old Testament commandments to support one point of view but then ignore other commandments of a similar class which are also of equal weight. Examples of this are certain commandments where God states explicitly they shall abide "for ever", or where God states a particular thing is an "abomination", but which are not undertaken by most Christians.

Christians reject the Talmudic oral tradition (Matt. 15:6); although the Catholic hierarchy makes a similar claim to inherit the correct interpretation for their respective written law: contrast with sola scriptura. Christians also disagree with the Jewish order of sacred texts (and some Christian traditions have included in their Old Testament books that are not included in today's Jewish canon, although they were included in the Jewish Septuagint). Historically, the Jewish oral tradition was not written down until the Babylonian Exile (Babylonian Talmud Jerusalem Talmud) and later developed more thoroughly through codification. Most importantly, Christians reject the covenant with God embodied in traditional Jewish scriptures and oral traditions as obsolete, and thus refer to their canon of Hebrew books as the "Old Testament." Christians believe that God has established a new covenant with people, and that this new covenant is established in an additional set of books collectively called the New Testament, together with the oral teachings of Jesus to the Apostles which have been handed down to this day.

Judaism has a great many teachings about peace and compromise, and its teachings make physical violence the last possible option. Nonetheless, the Talmud teaches that "If someone comes with the intention to murder you, then one is obligated to kill in self-defense". The clear implication is that to do anything less would be tantamount to suicide (which Jewish law forbids) and it would also be considered helping a murderer kill someone and "placing an obstacle in front of a blind man" (making it easier for another person to falter in their ways). The tension between the laws dealing with peace, and the obligation to self-defense, has led to a set of Jewish teachings that have been described as tactical-pacifism. This is the avoidance of force and violence whenever possible, but the use of force when necessary to save the lives of one's self and one's people.

Because Judaism focuses on this life, many questions to do with survival and conflict (such as the classic moral dilemma of two people in a desert with only enough water for one to survive) were analyzed in great depth by the rabbis within the Talmud, in the attempt to understand the principles a godly person should draw upon in such a circumstance.

The New Testament records that Jesus taught that if someone comes to harm you, then one must turn the other cheek. This has led four fairly sizable Protestant Christian denominations to develop a theology of pacifism, the avoidance of force and violence at all times. They are known historically as the peace churches, and have incorporated Christ's teachings on nonviolence into their theology so as to apply it to participation in the use of violent force; those denominations are the Quakers, Mennonites, Amish, and the Church of the Brethren. Many other churches have people who hold to the doctrine without making it a part of their doctrines, or who apply it to individuals but not to governments. The vast majority of Christian nations and groups have not adopted this theology, nor have they followed it in practice.

In the distant past Judaism was more evangelistic, but this was still more akin just to "greater openness to converts" (c.f. Ruth) rather than active soliciting of conversions. Since Jews believe that one need not be a Jew to approach God, there is no religious pressure to convert non-Jews to their faith.

By contrast, Christianity is an explicitly evangelical religion. Christians are commanded by Jesus to "go forth and Baptize all nations." At some times and in certain places joyful evangelism has veered into high-pressure coercion, resulting in at best significant ill-will and at worst human rights abuse.

This is broadly in line with the distinction made elsewhere that Jewish conversion is more like adoption to a family and people, Christian conversion more like a declaration of personal faith.

Mutual views
In addition to each having varied views on the other as a religion, there has also been a long and often painful history of conflict, persecution and at times, reconciliation, between the two religions, which have influenced their mutual views of their relationship over time.

Persecution, genocide and forcible conversion of Jews (ie hate crime) were common for many centuries, with occasional gestures to reconciliation from time to time. Pogroms were common throughout Christian Europe, including organized violence, restrictive land ownership and professional lives, forcible relocation and ghettoization, mandatory dress codes, and at times humiliating actions and torture. All had major effects on Jewish cultures.  

See: anti-Semitism 

More recently, even within the last century alone, some Jews remember the Holocaust and the current wave of evangelism as yet more reasons to doubt goodwill, while others look to the many peaceful gestures towards harmony since that time, likewise some Christians are at peace and others suspicious of Jews.

What is clear is that formally, there is strong inter-dialogue at many levels to reconcile past differences between the two groups, and many Christians emphasize common historical heritage and religious continuity with the ancient spiritual lineage of the Jews. 

On a religious level, Judaism does not believe that God requires the sacrifice of any human. This is emphasized in medieval Jewish traditions concerning the story of the Akedah, the binding of Isaac. In the Jewish explanation, this is a story whereby God wanted to test Abraham's faith and willingness, and Isaac was never going to be actually sacrificed. Thus, Judaism rejects the notion that anyone can or should die for anyone else's sin. As a religion, Judaism is far more focused on the practicalities of understanding how one may live a sacred life in this world according to God's will, rather than hope of spiritual salvation in a future one. Judaism does not believe in the Christian concept of Hell, nor that only those following one specific faith can be "saved". Judaism does have a punishment stage in the afterlife (i.e. Gehenna, a one year maximum purgatory) as well as a Heaven (Gan Eden), but the religion does not intend it as a focus.

Christmas and other Christian festivals have no religious significance in Judaism and are not celebrated. Celebration of non-Jewish holy days is considered Avodah Zarah or "Foreign Worship" and is forbidden; however some secular Jews in the West treat Christmas as a secular (but not religious) holiday.

Christians consider that the Law was necessary as an intermediate stage, but once the world was able to understand the significance of the Crucifixion, then adherence to Law was superseded by faith in Christ as the path to God, and that many of the laws in the Old Testament (the Jewish Five Books of Moses) are no longer required to be applied in life, since humanity is now able to understand and be saved by Jesus directly.

Many Christians today hold to super-sessionism, the belief that the Jews' chosen-ness found its ultimate fulfillment through the message of Jesus: Jews who remain non-Christian are no longer considered to be chosen, since they reject Jesus as the Messiah and Son of God. This position has been softened or even completely abrogated by some churches where Jews are recognized to have a special status due to their covenant with God, so that this continues to be an area of on-going dispute among Christians.

Some forms of Christianity which view the Jewish people as close to God, seek to understand and incorporate elements of Jewish understanding or perspective into their Christian beliefs as a means to respect their "parent" religion or to more fully seek out and return to their Christian roots. More evangelistic Christians tend to see Jews as essentially misguided by not choosing Christ, and as a people whom there is a more specific duty to evangelize or convert.