Study Sheet – Conversion to Judaism

1. Definitions and Terminology

"Ger" (masculine) and "giyoret" (feminine) refer to a man and woman who have converted to Judaism. "Ger tzedek" (righteous convert) is distinguished from "ger toshav" (resident alien), a non-Jew who accepts the seven Noahide laws.

After conversion, the ger is fully Jewish in every aspect of halakhah. The Talmud (Yevamot 22a) says: "A convert is like a newborn."

Conversion is irreversible. Even if the convert subsequently ceases to observe mitzvot, they remain Jewish. The Talmud (Yevamot 47b): "A Jew, even though they have sinned, remains a Jew."

2. Attitudes in the Talmudic Sources

The attitude is ambivalent. The Talmud (Yevamot 47a-b) teaches that one should inform the candidate of the difficulties but not discourage them excessively.

Rabbi Chelbo says that "converts are as hard for Israel as a sore" (Yevamot 109b) — interpreted either as criticism (they don't keep their commitments) or as a compliment (they are so pious they put born Jews to shame).

The quintessential positive model: Ruth the Moabite. Her declaration to Naomi — "Your people shall be my people, and your God my God" (Ruth 1:16) — is the perfect expression of sincere conversion. The Talmud uses the Ruth-Naomi dialogue as the basis for the candidate reception protocol. Ruth is an ancestor of King David and the Messiah — demonstrating the supreme nobility of conversion.

Other famous converts: Yitro (Moses' father-in-law), Rahav (of Jericho, ancestor of prophets per the midrash), Onkelos (author of the Targum), Aquila (translator of the Bible into Greek), Obadiah the Proselyte (12th century, recipient of a celebrated letter from Maimonides).

3. The Stages of Conversion

Conversion represents the decision to live according to the faith of Israel and the Torah's commandments, to integrate into the Jewish community, and to accept the responsibility of transmission.

Fundamental stages:

1. Application and study (classes, learning)
2. Knowledge examination (written and oral)
3. Circumcision for men (Brit Milah or hatafat dam brit if already circumcised)
4. Immersion in the mikveh before a Beit Din
5. Kabbalat ol mitzvot (acceptance of the yoke of commandments)

At the Paris Consistoire: minimum duration of 18 months. Written exam of 280 questions on five topics (history/calendar, kashrut, holidays, Shabbat, family purity). Oral exam before three rabbis.

Conversion requests motivated solely by marriage are not accepted by the Consistoire.

4. Kabbalat Ol Mitzvot

This is the candidate's solemn commitment, before the Beit Din, to observe the mitzvot of the Torah. Considered by the majority of decisors as the essential condition (me'akev) of the conversion — without sincere acceptance, the conversion is invalid.

The candidate does not need to know all 613 mitzvot, but must understand and accept the fundamental obligations.

Practical obligations involved: observance of kashrut, Shabbat and Yom Tov, regular community participation, ability to read Hebrew, knowledge of basic blessings.

5. The Mikveh and Immersion

The mikveh is a ritual bath containing at least 40 se'ah (approximately 575–770 liters) of natural water (rainwater, spring). Immersion (tevilah) is the final and indispensable step — for both men and women.

Validity conditions: natural source water (not carried in a vessel), complete immersion (not a single hair above water), in the presence of the Beit Din (nearby), blessing "al hatevilah."

Symbolism: water represents the source of all life (the primordial waters of Creation, Bereshit 1:2). The convert "dies" to their former identity and is "reborn" as a Jew. Maimonides (Hilkhot Mikvaot 11:12): purification that is both physical and spiritual.

The sea, a lake, or a river may serve as a mikveh if large enough and naturally fed. In practice, a constructed mikveh is preferred for controlled conditions.

6. The Beit Din

The Beit Din (rabbinic court) consists of three judges/rabbis. It supervises and validates the conversion:

• Evaluates the candidate's sincerity
• Verifies knowledge and practice
• Accepts the commitment (kabbalat ol mitzvot)
• Supervises circumcision (men) and mikveh immersion
• Issues the conversion certificate (te'udat giyur)

Typical Beit Din questions: motivation, knowledge (Shabbat, kashrut, holidays, prayers), understanding of responsibilities and difficulties, commitment to observe mitzvot, community integration. The tone should be welcoming.

The Beit Din may refuse if: the candidate is not sincere, their motivation is purely external, knowledge is insufficient, or the commitment is not genuine.

7. During the Preparation Period

Before conversion, the candidate cannot observe certain mitzvot as a Jew (no minyan, no aliyah). However, progressive integration is expected: kashrut, study, synagogue attendance.

Shabbat: the Talmud (Sanhedrin 58b) teaches that a non-Jew must not observe Shabbat completely. Candidates are therefore advised to perform a small normally forbidden act (such as turning on a light) to avoid "keeping" Shabbat fully. After conversion: full observance.

Hebrew study: no formal halakhic requirement, but basic knowledge is strongly expected for prayer and synagogue life. Most programs include liturgical Hebrew.

Typical process duration: between one and three years depending on the candidate and the Beit Din's requirements.

8. After Conversion

The convert may recite the first Shema Yisrael as a Jew — often a deeply moving moment. They recite "our ancestors Abraham, Isaac, and Jacob" in prayer (Rambam, Iggeret le-Ovadyah haGer).

Prayer after immersion: blessing "al hatevilah," sometimes Shehecheyanu.

Hebrew name: the convert takes a Hebrew name used for religious acts (aliyah, ketubah). They are called "[Name] ben/bat Avraham Avinu." Any Hebrew name is acceptable; common ones: Avraham (men), Ruth or Sarah (women).

Very limited restrictions: a male convert may not marry a woman of Kohen lineage (according to some opinions); he cannot be king of Israel. Otherwise, fully Jewish.

A convert may become a rabbi. Several Talmudic Sages were of convert origin (Rabbi Akiva, Onkelos, Shemaya, Avtalion).

The convert should not sever ties with their non-Jewish family. Honoring parents remains obligatory (Shulchan Arukh, Yoreh De'ah 241:9). They navigate situations (non-kosher meals, secular holidays) with wisdom and tact.

9. Giyur Lechumra and Mutual Recognition

Giyur lechumra is a precautionary conversion for someone whose Jewish status is uncertain (Ethiopian Jews, children of non-Orthodox conversions, etc.). Same steps but preparation may be lighter.

Mutual recognition of conversions: Orthodox Judaism generally recognizes only Orthodox conversions. Conservative and Reform conversions are not recognized by Orthodox authorities or the Chief Rabbinate of Israel. The Conservative movement recognizes its own conversions and those of Orthodoxy. The Reform movement recognizes all conversions.

Key Takeaways – Summary