The only use of a knowledge of the past is to equip us for the present. The present contains all that there is. It is holy ground; for it is the past, and it is the future.

True courage is not the brutal force of vulgar heroes, but the firm resolve of virtue and reason.

...the self-satisfied dogmatism with which mankind at each period of its history cherishes the delusion of the finality of existing modes of knowledge.

Each human being is a more complex structure than any social system to which he belongs.

Everyone is a philosopher. Not everyone is good at it.

I would be a billionaire if I was looking to be a selfish boss. That's not me.

Life is an offensive, directed against the repetitious mechanism of the Universe.