"Let's say that when I was a little baby, and all my bones soft and malleable, I was put in a small Episcopal cruciform box and so took my shape. Then, when I broke out of the box, the way a baby chick escapes an egg, is it strange that I had the shape of a cross? Have you ever noticed that chickens are roughly egg-shaped?"
Source : William Goldman (2013). “The Princess Bride: An Illustrated Edition of S. Morgenstern's Classic Tale of True Love and High Adventure”, p.364, Houghton Mifflin Harcourt