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

Don't think, but look! (PI 66)

This procedure [selecting the simplest law], however, has no logical justification but only a psychological one.

Language is a part of our organism and no less complicated than it.

I am not interested in constructing a building, so much as in having a perspicuous view of the foundations of possible buildings.

In order to be able to set a limit to thought, we should have to find both sides of the limit thinkable (i.e. we should have to be able to think what cannot be thought).

It is obvious that an imagined #‎ world , however different it may be from the real one, must have something - a form - in common with it.