Ludwig Wittgenstein

"Whereof one cannot speak, thereof one must be silent."

"The limits of my language mean the limits of my world."

"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 world is everything that is the case."

"What can be shown, cannot be said."

"Genius is talent exercised with courage."

"The only way to deal with an unfree world is to become so absolutely free that the very existence of the world is a form of liberation."

"If you wish to leave a mark on the world, you do so by accumulating detailed knowledge."

"A man will be imprisoned in a room with an open door that he does not see."

"Don't think, look!"

"Philosophy is a battle against the bewitchment of our intelligence by means of language."

"The more you own, the more it owns you."

"If people never did silly things nothing intelligent would ever get done."

"Logic must take care of itself."

"The world of the happy man is a different one from that of the unhappy man."

"It is correct to say 'I think' but not 'I think that I think,' and certainly not 'I think that I exist.'"

"Whereof one cannot speak, one must pass over in silence."

"What is your aim in philosophy? To show the fly the way out of the bottle."

"The aspects of things that are most important to us are hidden because of their simplicity and familiarity."

"One could imagine someone arguing passionately for the slaughter of a calf in the particular case and, in a clashing tone, against its destruction in another case."

"A serious and good philosophical work could be written that would consist entirely of jokes."

"The picture theory of meaning."

"Forget all theory, keep only what you can practice."

"Language disguises thought."

"In order to draw a limit to thinking, we should have to find both sides of the limit thinkable."

"The task of philosophy is to work out the problems that arise when we misunderstand the use of our words."

"My difficulty is only an—enormous—difficulty of expression."

"We feel that even when all possible scientific questions have been answered, the problems of life remain completely untouched."

"To understand a sentence means to understand a language."

"The truth of my statements is the attitude with which they are employed."