A philosophical problem has the form: I don't know my way about.

The philosophical I is not the man, not the human body or the human soul of which psychology treats, but the metaphysical subject, the limit - not a part of the world.

A serious and good philosophical work could be written consisting entirely of jokes.

It is an hypothesis that the sun will rise tomorrow: and this means that we do not know whether it will rise.

I don't know why we are here, but I'm pretty sure that it is not in order to enjoy ourselves.

Man has to awaken to wonder - and so perhaps do peoples. Science is a way of sending him to sleep again.