"It is as if a man were acquiring the knowledge of the humors and desires of a great strong beast which he had in his keeping, how it is to be approached and touched, and when and by what things it is made most savage or gentle, yes, and the several sounds it is wont to utter on the occasion of each, and again what sounds uttered by another make it tame or fierce, and after mastering this knowledge by living with the creature and by lapse of time should call it wisdom, and should construct thereof a system and art and turn to the teaching of it, knowing nothing in reality about which of these opinions and desires is honorable or base, good or evil, just or unjust, but should apply all these terms to the judgments of the great beast, calling the things that pleased it good, and the things that vexed it bad, having no other account to render of them, but should call what is necessary just and honorable, never having observed how great is the real difference between the necessary and the good, and being incapable of explaining it to another."