Prejudice does not mean false ideas, but only ... opinions adopted before examination.

Christianity was preached by ignorant men and believed by servants, and that is why it resembles nothing ever known.

Man's destructive hand spares nothing that lives; he kills to feed himself, he kills to clothe himself, he kills to adorn himself, he kills to attack, he kills to defend himself, he kills to instruct himself, he kills to amuse himself, he kills for the sake of killing.

The concept of number is the obvious distinction between the beast and man.

Nothing is necessary except God, and nothing is less necessary than pain.

Every country has the government it deserves.

It is not the mediocrity of women's education which makes their weakness; it is their weakness which necessarily causes their mediocrity.