For what then would that shape be?

“He said that whether a man’s life was writ in a book someplace or whether it took its form day by day was one and the same for it had but one reality and that was the living of it. He said that while it was true that men shape their own lives it was also true that they could have no shape other for what then would that shape be?”

~ Cormac McCarthy, The Crossing, 1994