“Never do anything against conscience, even if the state demands it.”

“Don't do anything that goes against your conscience, even if your country says so.”

“Anyone who has never made a mistake has never tried anything new.”

“The state was made for man, not man for state.”

“The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it.”

“Only one who devotes himself to a cause with his whole strength and soul can be a true master. For this reason mastery demands all of a person.”

“Somebody who only reads newspapers and at best books of contemporary authors looks to me like an extremely near-sighted person who scorns eyeglasses. He is completely dependent on the prejudices and fashions of his times, since he never gets to see or hear anything else.”