Quotes by Sigmund Freud

"Being entirely honest with oneself is a good exercise."

"From error to error one discovers the entire truth."

"Knowledge is the intellectual manipulation of carefully verified observations."

"Men are strong only so long as they represent a strong idea. They become powerless when they oppose it."

"The voice of the intellect is a soft one, but it does not rest till it has gained a hearing."

"Thought is action in rehearsal."

"What we call happiness in the strictest sense comes from the (preferably sudden) satisfaction of needs which have been dammed up to a high degree."