The logic of the world is prior to all truth and falsehood.

Elementary propositions consist of names.

Like everything metaphysical the harmony between thought and reality is to be found in the grammar of the language.

One can defend common sense against the attacks of philosophers only by solving their puzzles, i.e., by curing them of the temptation to attack common sense.

Nothing is so difficult as not deceiving oneself.

What signs fail to express, their application shows. What signs slur over, their application says clearly.

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.