Conversion 101

What you need to know about converting to Judaism.

Becoming a Jew is not just a one-time declaration of faith but rather an evolutionary process that culminates in the adoption of a new cultural, national, and even historical identity. Conversion to Judaism requires serious study, active participation in Jewish holiday and lifecycle events, and, finally, a commitment to Jewish practice that is actualized by a rabbinically prescribed ritual.

Scroll down for a video on converting to Judaism.

Find an introduction to Judaism class here.

About Conversion

Even the Talmudic rabbis understood that a transformation of such magnitude as conversion had to be motivated by sincere conviction, what they termed “for the sake of Heaven.” In fact, the rabbis did not accept conversions to accommodate another’s wishes or of to achieve social or economic gain. Many contemporary rabbis, however, allow conversions for the sake of marriage, holding that many such converts eventually evolve into sincere Jews.

Conversion History

The history of conversion reflects the treatment of Jews by surrounding cultures, moving between active proselytizing and passive acceptance of converts as the majority culture becomes more and less hospitable to Jews. In the biblical period outsiders joined the Israelite nation via assimilation; the beginning of formal conversion history awaited the evolution of the nationalist God of the Torah to the universal God of the prophets as well as the move from the sacrificial Temple cult to the portable religion of prayer and study developed by the rabbis.

With a God who could now be worshipped outside the land of Israel, the stage was set for a period of more active proselytizing that culminated in a Roman empire that was 10 percent Jewish by the beginning of the Christian era.

Later, when Christian and then Muslim authorities made conversion to Judaism illegal, Jews turned inward, focusing on careful observance of God’s law and left the initiation of the conversion process to the potential converts themselves. The attitude of mistrust and even dissuasion of potential converts from this period became the Jewish “tradition” when enshrined in the medieval Jewish law codes. The emancipation set the stage for a reconsideration of the appropriate boundaries between Jews and non-Jews.

Conversion Process: Idea to Realization

The “birth” of a new Jew through conversion mirrors the process by which the Israelites became God’s people and accepted God’s covenant at Sinai: Circumcision, which male Israelites underwent before leaving Egypt, and immersion, which parallels the ritual cleansing performed by all Israelites at Sinai, are the sine qua non rituals of the conversion process. Full responsibility for every conversion rests in a three-person beit din, or rabbinic court, which searches out candidates’ motivations, ascertains their knowledge of Judaism, and approves the conversions.

Contemporary Issues in Conversion

Because conversion requirements set the standard for who can legitimately be considered a Jew, disagreements between the denominations/movements on this issue have serious consequences for Jewish unity. Orthodox rabbis will generally not accept conversions performed by the liberal movements, who they believe do not fulfill all rabbinic requirements for conversion. Liberal rabbis, however, will usually accept any conversion performed under the auspices of a Jewish movement.

In Israel the “Who is a Jew?” issue is complicated because the Orthodox rabbinate controls all conversions. Another contemporary issue is the legitimacy of active outreach that some liberal rabbis are promoting as a response to assimilation and intermarriage — both to non-Jewish spouses in intermarriages and to the larger public.

Discover More

When Do Jews Fast?

In addition to Yom Kippur, there are many public and private fasts in Judaism.

Kiddushin 73

How to avoid being pelted with etrogs.