There is nothing very odd about lambs disliking birds of prey, but this is no reason for holding it against large birds of prey that they carry off lambs. And when the lambs whisper among themselves, "These birds of prey are evil, and does this not give us a right to say that whatever is the opposite of a bird of prey must be good," there is nothing intrinsically wrong with such an argument-though the birds of prey will look somewhat quizzically and say, We have nothing against these good lambs; in fact, we love them; nothing tastes better than a tender lamb.
Everything desires not like but unlike: for example, the dry desires the moist, the cold the hot, the bitter the sweet, the sharp the blunt, the void the full, the full the void, and so of all other things; for the opposite is the food of the opposite, whereas like receives like receives nothing from like.
Persuasion, kind, unassuming persuasion, should be adopted to influence the conduct of men. The opposite course would be a reversal of human nature, which is God's decree and can never be reversed.
...in this way the structure of the universe- I mean, of the heavens and the earth and the whole world- was arranged by one harmony through the blending of the most opposite principles.