" He said after a little while, 'I see why you say that only men do evil, I think. Even sharks are innocent, they kill because they must.'
'That is why nothing can resist us. Only one thing in the worl can resist an evil-hearted man. And that is another man. In our shame is our glory. Only our spirit, which is capable of evil, is capable of overcoming it. "

― Ursula K. Le Guin , The Farthest Shore (Earthsea Cycle, #3)