Giyur

Rabbinic law asks a would be convert to Judaism to be turned away three times before instruction begins, a custom explained as testing sincerity in a tradition that does not proselytise and that has, across long stretches of history, made conversion actively dangerous under regimes hostile to Jewish practice. Once accepted as a serious candidate, the convert undertakes a substantial course of study covering Jewish law, practice, history and belief, its length and content varying by community and by the sponsoring rabbi or beit din, the rabbinic court of three that ultimately judges the conversion valid.

The classical requirements converge on a beit din's acceptance of the candidate's sincerity and knowledge, immersion in a mikveh, a ritual bath meeting exacting standards of construction and natural water source, and, for men, circumcision, or, for men already circumcised, a symbolic drawing of a drop of blood, hatafat dam brit, understood to complete the covenant physically as well as spiritually. Because Judaism has no single central authority, what counts as a valid conversion is itself a matter of real and consequential disagreement between Orthodox, Conservative and Reform authorities, and a conversion recognised by one movement is not automatically recognised by another, a division with direct legal consequences in Israel, where recognised Jewish status affects immigration and marriage rights.

The mikveh immersion that completes giyur is performed before witnesses from the beit din, who confirm that the immersion was total, unclothed and unbroken by anything separating the body from the water, and the convert typically recites blessings marking acceptance of the commandments at this point, the moment classical sources treat as the legal completion of the conversion itself, after which the convert is, in Jewish law, considered as though newly born, with family status and communal standing reset.

A chosen Hebrew name is usually taken at or before this point, often incorporating the honorific ben or bat Avraham, son or daughter of Abraham, reflecting the convert's new spiritual lineage rather than a biological one. The disagreement between movements over what constitutes valid giyur centres on questions the Orthodox world considers non negotiable, principally a full and sincere commitment to observe Jewish law as classically defined, and that Reform and Reconstructionist authorities, working from different premises about the binding force of that law, do not require in the same terms, producing conversions that stand as fully valid within one movement and are not accepted as such within another. Maimonides' codification in the Mishneh Torah remains a central classical reference point cited by authorities across the spectrum even where they differ sharply on its application to the modern convert.