"Devils are depicted with bats' wings and good angels with birds' wings, not because anyone holds that moral deterioration would be likely to turn feathers into membrane, but because most men like birds better than bats."

Previous Quote

Forelimbs of people, porpoises, bats and horses provide the classic example of homology in most textbooks. They look different, and do different things, but are built of the same bones. No engineer, starting from scratch each time, would have built such disparate structures from the same parts.

— Stephen Jay Gould