The symbol of the cosmic egg

"In ancient times, the primeval universe -- or the Great Mother -- took the form of an egg. It carried all numbers and letters within an ellipse in order to show that everything is contained within one form at the beginning," from Barbara G. Walker's Women's Dictionary of Symbols and Sacred Objects, which I just found here at the National Taiwan University library.

People don't seem to have a whole lot of good to say about Walker's overall content, however.