Socrates (469 BC—399 BC)

"A system of morality which is based on relative emotional values is a mere illusion, a thoroughly vulgar conception which has nothing sound in it and nothing true."

"The unexamined life is not worth living."

"Know thyself.
I cannot teach anybody anything.
I can only make them think."

"The only good is knowledge and the only evil is ignorance."

"All human virtues increase and strengthen themselves by the practice of them."

"Remember what is unbecoming to do is also unbecoming to speak of."

"I do nothing but go about persuading you all, old and young alike, not to take thought for your persons or your properties, but and chiefly to care about the greatest improvement of the soul."

"It is not living that matters, but living rightly."

"The end of life is to be like God, and the soul following God will be like Him."

"An education obtained with money is worse than no education at all."

"False words are not only evil in themselves, but they infect the soul with evil."

"Well I am certainly wiser than this man. It is only too likely that neither of us has any knowledge to boast of, but he thinks that he knows something which he does not know, whereas I am quite conscious of my ignorance. At any rate it seems that I am wiser than he is to this small extent, that I do not think that I know what I do not know."

"True wisdom comes to each of us when we realize how little we understand about life, ourselves, and the world around us."

"Beware of the barrenness of a busy life."