Letter 88 — On Liberal and Vocational Studies (§45)

“You may sweep all these theories in with the superfluous troops of “liberal” studies; the one class of men give me a knowledge that will be of no use to me, the other class do away with any hope of attaining knowledge. It is better, of course, to know useless things than to know nothing. One set of philosophers offers no light by which I may direct my gaze toward the truth; the other digs out my very eyes and leaves me blind. If I cleave to Protagoras, there is nothing in the scheme of nature that is not doubtful; if I hold with Nausiphanes, I am sure only of this—that everything is unsure; if with Parmenides, there is nothing except the One; if with Zeno, there is not even the One.”