"Prefer knowledge to wealth, for the one is transitory, the other perpetual."

"Those who render no service either by word or deed, who cannot help army or city or the people itself in time of need, ought to be stopped, even if they have riches in abundance, above all if they are…"

"Education is the kindling of a flame, not the filling of a vessel."

"For fear of death is indeed nothing other than to think oneself wise when one is not; for it is to think one knows what one does not know."

"I shall obey God rather than you, and while I have life and strength I shall never cease to practice philosophy..."