The longer we dwell on our misfortunes, the greater is their power to harm us.

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

It is a mania shared by philosophers of all ages to deny what exists and to explain what does not exist.

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.