All is ephemeral — fame and the famous as well. Book IV

When a simple man who has no skill in dialectics believes an argument to be true which he afterwards imagines to be false, whether really false or not, and then another and another, he no longer has any faith left, and great disputers, as you know, come to think, at last that they have grown to be the wisest of mankind; for they alone perceive the utter unsoundness and instability of all arguments, or, indeed, of all things, which like the currents in the Euripus, are going up and down in never-ceasing ebb and flow. The Trials Of Socrates

The assurance that we have no means of answering [final] questions is no valid excuse for callousness towards them. The more deeply should we feel, down to the roots of our being, their pressure and their sting. Whose hunger has ever been [sated] with the knowledge that he could not eat? History as a System

“A wise prince ought to . . . never in peaceful times stand idle, but increase his resources with industry in such a way that they may be available to him in adversity.” The Prince