"The worst evil is not the one committed by murderers, but by those who allow murder to happen."

"The small minority of men who are able to conceive of a new idea are the only men who discover truths. The rest are but the echoes of other men's thoughts."

"The only purpose of a government is to protect man's rights."

"There are no contradictions in reality. Contradictions exist only in the mind, in the mind of a man who makes a mistake."

"Every man is an end in himself, not the means to the ends of others."