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

I am still at Trattenbach, surrounded, as ever, by odiousness and baseness. I know that human beings on the average are not worth much anywhere, but here they are much more good-for-nothing and irresponsible than elsewhere.

What is your aim in philosophy? To show the fly the way out of the fly-bottle.

Everything that can be said, can be said clearly.

Philosophy just puts everything before us, and neither explains nor deduces anything.-Since everything lies open to view there is nothing to explain

Our greatest stupidities may be very wise.

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.