A ruler, in particular, needs to know how to be both an animal and a man. The classical writers, without saying it explicitly, taught rulers to behave like this. They described how Achilles, and many other rulers in ancient time, were given to Chiron the centaur to be raised, so he could bring them up as he thought best. What they intended to convey, with this story of rulers being educated by someone who was half beast and half man, was that it is necessary for a ruler to know when to act like an animal and when like a man; and if he relies on just one or the other mode of behaviour he cannot hope to survive.
—  Machiavelli, The Prince