The rabbis declared Torah scrolls to be impure by rabbinic law. Most are considered authorities in many areas of practical Halacha and Rabbinic and Talmudic academics. Custom can thus determine halachic practice in cases of disagreement among rabbinic authorities. His grandfather, Solomon Buber, was a scholar of Midrash and Rabbinic Literature. Karaite Judaism does not accept the oral legal traditions of Rabbinic Judaism. Conservative Judaism similarly emphasizes the study of Talmud within its religious and rabbinic education. Orthodox Judaism is a collective term for the traditionalist branches of contemporary Rabbinic Judaism. Orthodox Judaism considers itself to be in direct continuity with historical rabbinic Judaism. According to rabbinic tradition, there are 613 commandments in the Torah. Their responses would constitute Rabbinic Judaism. These shifts mark the transformation of Pharisaic to Rabbinic Judaism. The Simchat Torah celebration of today is of later rabbinic and customary origin. This article discusses the requirements of immersion in Rabbinic Judaism and its descendants. Outside of Rabbinic Judaism, evidence shows a diversity of practice. But it also reflects and speaks to an anxiety fundamental to Rabbinic Judaism.