Just be indipendent of the external world, so you don't have to fear for what's in it.

I think one of the things you and I have to learn is that we have to live without the consolation of belonging to a Church.... Of one thing I am certain. The religion of the future will have to be extremely ascetic, and by that I don't mean just going without food and drink.

It seems to me that, in every culture, I come across a chapter headed 'Wisdom.' And then I know exactly what is going to follow: 'Vanity of vanities, all is vanity.'

Concerning that which cannot be talked about, we should not say anything.

If we spoke a different language, we would perceive a somewhat different world.

A main cause of philosophical disease-an unbalanced diet: one nourishes one's thinking with only one kind of example.

In philosophy it is always good to put a question instead of an answer to a question. For an answer to the philosophical question may easily be unfair; disposing of it by means of another question is not.