We have not met out forgotten ancestors, but we begin to sense their presence in the dark. We recognize their shadows here and there. They were once as real as we are. We would not be here if it not for them. Our natures and theirs are indissolubly linked despite the aeons that seperate us. The key to who we are is waiting in those shadows.
Carl Sagan and Ann Druyan
Shadows of Forgotten Ancestors