Ludwig Wittgenstein

“It is an hypothesis that the sun will rise tomorrow: and this means that we do not know whether it will rise.”

“A man will be imprisoned in a room with a door that's unlocked and opens inwards; as long as it does not occur to him to pull rather than push.”

“The common behavior of mankind is the system of reference by means of which we interpret an unknown language.”

“Uttering a word is like striking a note on the keyboard of the imagination.”

“The limits of my language means the limits of my world.”

“Resting on your laurels is as dangerous as resting when you are walking in the snow. You doze off and die in your sleep.”

“If a lion could talk, we could not understand him.”

“One of the most misleading representational techniques in our language is the use of the word 'I.'”

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

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

“A philosophical problem has the form: I don't know my way about.”

“There are remarks that sow and remarks that reap.”

“For a truly religious man nothing is tragic.”

“One often makes a remark and only later sees how true it is.”

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

“Our greatest stupidities may be very wise.”

“Whereof one cannot speak, thereof one must be silent.”

“The world is the totality of facts, not of things.”

“Logic is not a body of doctrine, but a mirror-image of the world. Logic is transcendental.”