" Maimonides therefore undertook to compile a complete code, which would contain, in the language and style of the Mishnah, and without discussion, the whole of the Written and the Oral Law, all the precepts recorded in the Talmud, Sifra, Sifre and Tosefta, and the decisions of the Geonim. "

― Maimonides , The Guide for the Perplexed