The whole of theology, in regard to hell no less than to heaven, takes it for granted that Man is what is of most importance in the Universe of created beings. Since all theologians are men, this postulate has met with little opposition.

I think we ought always to entertain our opinions with some measure of doubt. I shouldn't wish people dogmatically to believe any philosophy, not even mine.

A man who has once perceived, however temporarily and however briefly, what makes greatness of soul, can no longer be happy if he allows himself to be petty, self-seeking, troubled by trivial misfortunes, dreading what fate may have in store for him. The man capable of greatness of soul will open wide the windows of his mind, letting the winds blow freely upon it from every portion of the universe.

The newspapers at one time said that I was dead but after carefully examining the evidence I came to the conclusion that this statement was false.

We believe, first and foremost, what makes us feel that we are fine fellows.

Have no respect for the authority of others, for there are always contrary authorities to be found

The greatest challenge to any thinker is stating the problem in a way that will allow a solution.