I might say: if the place I want to get to could only be reached by way of a ladder, I would give up trying to get there. For the place I really have to get to is a place I must already be at now. Anything that I might reach by climbing a ladder does not interest me.

You must always be puzzled by mental illness. The thing I would dread most, if I became mentally ill, would be your adopting a common sense attitude; that you could take it for granted that I was deluded.

A propositional sign, applied and thought out, is a thought. A thought is a proposition with a sense.

Nothing is so difficult as not deceiving oneself.

Philosophy is like trying to open a safe with a combination lock: each little adjustment of the dials seems to achieve nothing, only when everything is in place does the door open.

A picture held us captive. And we could not get outside it, for it lay in our language and language seemed to repeat it to us inexorably.

The logic of the world is prior to all truth and falsehood.