Ludwig Wittgenstein

A nothing will serve just as well as a something about which nothing could be said.

Logic must look after itself. In a certain sense, we cannot make mistakes in logic.

Propositions show what they say: tautologies and contradictions show that they say nothing.

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

It is one of the chief skills of the philosopher not to occupy himself with questions which do not concern him.

The common behavior of mankind is the system of reference by means of which we interpret an unknown language.

Our greatest stupidities may be very wise.

Nothing is so difficult as not deceiving oneself.

A new word is like a fresh seed sown on the ground of the discussion.

Logic is not a body of doctrine, but a mirror-image of the world. Logic is transcendental.

A confession has to be part of your new life.

One often makes a remark and only later sees how true it is.

The face is the soul of the body.

An inner process stands in need of outward criteria.

A philosopher who is not taking part in discussions is like a boxer who never goes into the ring.

Like everything metaphysical the harmony between thought and reality is to be found in the grammar of the language.

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

Logic takes care of itself; all we have to do is to look and see how it does it.

I sit astride life like a bad rider on a horse. I only owe it to the horse's good nature that I am not thrown off at this very moment.

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