“A similar tradition on the creative power of letters forms the basis of the following midrash on Job 28:11... This brings us to the text that played so important a part in the development of the golem concept: the Book of Yetsirah or the Book of Creation... We do not know the exact date of this enigmatic text,... We can only be sure that it was written by a Jewish Neo-Pythagorean some time between the third and sixth century.”
