Midrash

The rabbis distinguished two registers of midrash by what the interpreter was seeking. Midrash halakhah works through the legal sections of the Torah and derives binding law from the precise wording of the verses, using formal hermeneutical rules such as the inference from minor to major and the analogy between identical phrases. The classical collections of this kind are tannaitic: the Mekhilta of Rabbi Ishmael on Exodus, the Sifra on Leviticus, and the Sifre on Numbers and Deuteronomy, each associated by scholars with one of the two early interpretive schools, those of Rabbi Ishmael and Rabbi Akiva.

Midrash aggadah, by contrast, seeks meaning rather than statute. It fills the silences of the biblical narrative, gives speeches to Abraham and arguments to Moses, reconciles contradictory verses through story, and turns Scripture toward consolation and moral exhortation. Its masterpieces include Genesis Rabbah, with its dense verse-by-verse weave, Leviticus Rabbah and Pesikta de-Rav Kahana, built as cycles of homilies for sabbaths and festivals, and the later Tanhuma family. The two registers were never sealed off from each other; legal collections carry stories and homiletic ones carry law, because for the rabbis the whole Torah, narrative and statute alike, was a single fabric to be searched.

Midrash is not one book but a library assembled over roughly a thousand years. The earliest surviving collections, the halakhic midrashim, preserve tannaitic material and reached their present form in the third and fourth centuries CE. The amoraic centuries in the Land of Israel produced the first great aggadic compilations: Genesis Rabbah is generally dated to the fifth century, close in time and idiom to the Jerusalem Talmud, and Leviticus Rabbah and Pesikta de-Rav Kahana to the same Palestinian milieu. Lamentations Rabbah gathered the tradition's response to catastrophe around the destroyed Temple and the failed revolts.

Later centuries added the Tanhuma-Yelammedenu literature, Ecclesiastes Rabbah and the rest of the Rabbah cycle on the Five Scrolls, the narrative retelling Pirkei de-Rabbi Eliezer in the eighth century, and eventually medieval anthologies such as Yalkut Shimoni, which excerpted the whole inheritance verse by verse across the entire Bible. The collections differ in language as well as date, moving from Mishnaic Hebrew with Galilean Aramaic toward a more literary medieval Hebrew. What binds the library together is a shared conviction that Scripture is inexhaustible: that every generation may return to the same verses with new questions and find that the text, pressed once more, answers.