Turn it over, and [again] turn it over, for all is therein. And look into it; And become gray and old therein; And do not move away from it, for you have no better portion than it. —Mishnah Avot 5:22
Solving the Mystery of the Brick and the Book
A professor of Jewish art finds himself turning from one explanation of a puzzling drawing found in an old manuscript to another—and then possibly back again.