Talk sense to a fool and he calls you foolish.

One should not confuse the craving for life with endorsement of it.

Therefore it is necessary to arrive at a prime mover, put in motion by no other; and this everyone understands to be God.

The action is best, which procures the greatest happiness for the greatest numbers.

We are never so defenceless against suffering as when we love.

It is thus clear that, just as some are by nature free, others are by nature slaves, and for these latter the condition of slavery is both beneficial and just.

For I do not seek to understand that I may believe, but I believe in order to understand. For this I believe -- that unless I believe, I should not understand.

There is no great genius without some touch of madness.

Education is not preparation for life; education is life itself.

The thought of suicide is a great source of comfort: with it a calm passage is to be made across many a bad night.

Cunning and deceit will every time serve a man better than force.

Why on earth do would-be feminists adopt male standards of how to be sexual?

Religion is an illusion of childhood, outgrown under proper education.

I am too much of a sceptic to deny the possibility of anything.

The sentence 'snow is white' is true if, and only if, snow is white.

The violence in the world comes about because we human beings are forever creating barriers between men who are like us and men who are not like us.

If a man were to say he chose something impossible he would be thought a fool; but we can wish for things that are impossible, for instance immortality.

Science is no longer the quintessence of knowledge and of what is worth knowing, but a way. It is a way of addressing and penetrating into unexplored and unmasked realms.

Philosophers are as jealous as women. Each wants a monopoly of praise.

Yet it moves.