Tractatus Logico-Philosophicus

„1 — The world is everything that is the case. The world is the totality of facts, not of things.”

„2.012 In logic nothing is accidental: if a thing can occur in an atomic fact the possibility of that atomic fact must already be prejudged in the thing.”

„2.01231 In order to know an object, I must know not its external but all its internal qualities.”

„3 The logical picture of the facts is the thought.”

„3.03 We cannot think anything unlogical, for otherwise we should have to think unlogically.”

„3.328 If a sign is not necessary then it is meaningless. That is the meaning of Occam's razor.”

„3.343 Definitions are rules for the translation of one language into another. Every correct symbolism must be translatable into every other according to such rules. It is this which all have in common.”

„4.002 Language disguises the thought; so that from the external form of the clothes one cannot infer the form of the thought they clothe, because the external form of the clothes is constructed with quite another object than to let the form of the body be recognized.”

„4.003 Most propositions and questions, that have been written about philosophical matters, are not false, but senseless. […] Most questions and propositions of the philosophers result from the fact that we do not understand the logic of our language.”

„4.022 The proposition shows its sense. The proposition shows how things stand, if it is true. And it says, that they do so stand.”

„4.112 The object of philosophy is the logical clarification of thoughts. Philosophy is not a theory but an activity. […] Philosophy should make clear and delimit sharply the thoughts which otherwise are, as it were, opaque and blurred.”

„4.121 That which mirrors itself in language, language cannot represent. That which expresses itself in language, we cannot express by language.”

„4.1212 What can be shown cannot be said.”

„5.1361 The events of the future cannot be inferred from those of the present. Superstition is the belief in the causal nexus.”

„5.6 The limits of my language mean the limits of my world.”

„5.61 Logic fills the world: the limits of the world are also its limits.”

„5.63 I am my world. (The microcosm.)”

„6.1 The propositions of logic are tautologies. The propositions of logic therefore say nothing.”

„6.361 Only uniform connexions are thinkable.”

„6.4311 Death is not an event of life. Death is not lived through. If by eternity is understood not endless temporal duration but timelessness, then he lives eternally who lives in the present. Our life is endless in the way that our visual field is without limit.”

„6.432 How the world is, is completely indifferent for what is higher. God does not reveal himself in the world.”

„6.44 Not how the world is, is the mystical, but that it is.”

„6.45 The contemplation of the world sub specie aeterni is its contemplation as a limited whole. The feeling of the world as a limited whole is the mystical feeling.”