"What can be said at all can be said clearly, and what we cannot talk about we must pass over in silence."

"Is it not a strange phenomenon that in the most highly developed civilizations, people are still afraid of the truth?"

"It is not a matter of 'fitting' language to reality, but of language being reality."

"Philosophy is not a theory but an activity."

"Philosophy is a fight against the fascination which forms of expression exert upon us."