A passing remark in the Babylonian Talmud (Sanhedrin 65b) states that two rabbis created and ate a three year old calf. They did this by studying something called The Book of Creation, Sefer Yetsirah in Hebrew. One might wonder why, having gone to the trouble of performing such a feat, the two rabbis simply ate the calf. But the Talmud tells us nothing more about it.
This brief reference is the earliest mention of Sefer Yetsirah. Several hundred years were to pass before it was mentioned again. When it did resurface, in the tenth century, it was presented by its commentators as a scientific treatise on the creation of the world. Continue reading