Socrates

"The only true wisdom is in knowing you know nothing."

"To find yourself, think for yourself."

"The unexamined life is not worth living."

"Wonder is the beginning of wisdom."

"Be as you wish to seem."

"The secret of change is to focus all of your energy not on fighting the old, but on building the new."

"Wisdom begins in wonder."

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

"True knowledge exists in knowing that you know nothing."

"By all means marry; if you get a good wife, you'll become happy; if you get a bad one, you'll become a philosopher."

"The only way to deal with an unfree world is to become so absolutely free that very existence is an act of rebellion."

"Knowing thyself is the beginning of all wisdom."

"Death may be the greatest of all human blessings."

"Strong minds discuss ideas; average minds discuss events; weak minds discuss people."

"If you don't get what you want, you suffer; if you get what you don't want, you suffer."

"An unexamined life is not worth living."

"Nothing is stronger than habit."

"The poor are made of flesh and blood and memory, and they would be a warm man's brothers."

"Employ your time in improving yourself by other men's writings so that you shall gain easily what others have labored hard for."

"Beware the barrenness of a busy life."

"Be slow to fall into friendship; but when thou art in, continue firm and constant."

"He who is not contented with what he has, would not be contented with what he would like to have."

"The only evil is ignorance."

"We are dying from coughing, but we are not coughing from dying."

"I am not an Athenian or a Greek, but a citizen of the world."

"Virtue does not come from money, but money comes from virtue."

"The hottest love has the coldest end."

"Everything flows, nothing stands still."

"The way to gain a good reputation is to endeavor to be what you desire to appear."

"Worthless people live only to eat and drink; people of worth eat and drink only to live."