Developing over a period of five centuries (until c.A.D. 500), rabbinic Judaism completed the process already underway, which saw the replacement of the Temple by the synagogue (the Second Temple was destroyed in A.D. 70), of the priest by the rabbi, and of the sacrificial ceremony by the prayer service and study. Basic to these changes was the redaction and codification of the Oral Law (see Mishna; Talmud) and the Midrash, which, as outgrowths of the biblical religion, centered on the relationships between God, His Torah, and His people, Israel. Emphasis was placed upon study of the Torah (in its broadest sense) as the most important religious act, leading to an understanding of the proper way of life; upon the growing need for national restoration in the face of continued Exile from the Promised Land; and upon the function of this world as preparatory for the World to Come ( Olam ha-Bah ), while not devaluing the importance of life in this world.
Daily life was sanctified by the emphasis in Jewish law (halakah) on the ritual fitness of foods ( kashrut ), the recitation of blessings for a variety of mundane acts, and the daily, weekly, monthly and annual cycles of prayer. Rites for the personal life cycle came to include circumcision of male infants at the age of eight days, signifying their induction into the covenant between God and Israel; the recognition of thirteen years as the age of majority for religious responsibilities (see Bar Mitzvah); marriage; and funeral rites. During the medieval period, these trends continued and were basic to the several important codifications of the legal material and to the many biblical and Talmudic commentaries that were composed at this time (most notably by Rashi and Maimonides).