More quotes by Plato

"Wise men talk because they have something to say; Fools, because they have to say something."
"The soul of him who has education is whole and perfect and escapes the worst disease, but, if a man's education be neglected, he walks lamely through life and returns good for nothing to the world below."
"False words are not only evil in themselves, but they infect the soul with evil."
"One of the penalties of refusing to participate in politics is that you end up being governed by your inferiors."
"Knowledge becomes evil if the aim be not virtuous."