You ought never to sass old people- unless they sass you first.

It is a good and gentle religion, but inconvenient.

I'm glad I did it, partly because it was worth it, but mostly because I shall never have to do it again.

Reputation is a hall-mark: it can remove doubt from pure silver, and it can also make the plated article pass for pure.

Every man is in his own person the whole human race without a detail lacking....I knew I should not find in any philosophy a single thought which had not passed through my own head, nor a single thought which had not passed through the heads of millions and millions of men before I was born.

Let us consider that we are all insane. It will explain us to each other. It will unriddle many riddles

Of all God's creatures, there is only one that cannot be made slave of the leash. That one is the cat. If man could be crossed with the cat it would improve the man, but it would deteriorate the cat.