This is the case with many learned persons; they have read themselves stupid.

Life without pain has no meaning.

That arithmetic is the basest of all mental activities is proved by the fact that it is the only one that can be accomplished by a machine.

We can come to look upon the deaths of our enemies with as much regret as we feel for those of our friends, namely, when we miss their existence as witnesses to our success.

There is only one inborn error. and that is the notion that we exist in order to be happy.

The greatest of follies is to sacrifice health for any other kind of happiness.

The conviction that the world and man is something that had better not have been, is of a kind to fill us with indulgence towards one another.