When you are philosophizing you have to descend into primeval chaos and feel at home there.

I won't say 'See you tomorrow' because that would be like predicting the future, and I'm pretty sure I can't do that.

Not how the world is, but that it is, is the mystery.

The depressed man lives in a depressed world.

For a large class of cases - though not for all - in which we employ the word meaning it can be explained thus: the meaning of a word is its use in the language.

It would strike me as ridiculous to want to doubt the existence of Napoleon; but if someone doubted the existence of the earth 150years ago, perhaps I should be more willing to listen, for now he is doubting our whole system of evidence.

Someone who knows too much finds it hard not to lie.