A picture is a model of reality.

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

Sometimes, in doing philosophy, one just wants to utter an inarticulate sound.

Genius is talent exercised with courage.

What is left over if I subtract the fact that my arms goes up from the fact that I raise my arm?

In order to draw a limit to thinking, we should have to think both sides of this limit.

Philosophy aims at the logical clarification of thoughts. Philosophy is not a body of doctrine but an activity. A philosophical work consists essentially of elucidations.