Socrates

“True knowledge exists in knowing that you know nothing.”

“An un-examined life is not worth living.”

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

“The world is a puzzle; no need to make sense out of it.”

“It is better to change an opinion than to persist in a wrong one.”

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

“Falling down is not failure. Failure comes when you stay where you have fallen.”

“Sometimes you put walls up not to keep people out, but to see who cares enough to break them down.”

“To find yourself, think for yourself.”

“Be of good cheer about death, and know this of a truth, that no evil can happen to a good man, either in life or after death.”

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

“He is richest who is content with the least, for content is the wealth of nature.”