I know that I am intelligent, because I know that I know nothing.

Man, alone, has the power to transform his thoughts into physical reality; man, alone, can dream and make his dreams come true.

Man is the only creature that refuses to be what he is.

Let us permit nature to have her way. She understands her business better than we do.

One man's ways may be as good as another's, but we all like our own best.