Aristotle, Nicomachean Ethics
H. Rackham, Ed.

Nor is Prudence a knowledge of general principles only: it must also take account of particular facts, since it is concerned with action, and action deals with particular things. This is why men who are ignorant of general principles are sometimes more successful in action than others who know them: ¹ for instance, if a man knows that light meat is easily digested and therefore wholesome, but does not know what kinds of meat are light, he will not be so likely to restore you to health as a man who merely knows that chicken is wholesome; and in other matters men of experience are more successful than theorists. And Prudence is concerned with action, so one requires both forms of it, or indeed knowledge of particular facts even more than knowledge of general principles. Though here too there must be some supreme directing faculty.²