Better not be a hero than work oneself up into heroism by shouting lies.

Oaths are the fossils of piety.

Eternal vigilance is the price of knowledge.

My atheism, like that of Spinoza, is true piety towards the universe and denies only gods fashioned by men in their own image, to be servants of their human interests.

I believe in general in a dualism between facts and the ideas of those facts in human heads.

When men and women agree, it is only in their conclusions; their reasons are always different.

To understand oneself is the classic form of consolation; to elude oneself is the romantic.