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.

The fact that we can describe the motions of the world using Newtonian mechanics tell us nothing about the world. The fact that we do, does tell us something about the world.

One can mistrust one's own senses, but not one's own belief.

Don't for heaven's sake, be afraid of talking nonsense! But you must pay attention to your nonsense.

Suppose we think while we talk or write--I mean, as we normally do--we shall not in general say that we think quicker than we talk, but the thought seems not to be separate from the expression.

To understand a sentence means to understand a language. To understand a language means to be master of a technique.

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