Logic must look after itself. In a certain sense, we cannot make mistakes in logic.

Only when one thinks even much more madly than the philosophers can one solve their problems.

Don't get involved in partial problems, but always take flight to where there is a free view over the whole single great problem, even if this view is still not a clear one.

At the end of reasons comes persuasion.

Where does our investigation get its importance from, since it seems only to destroy everything interesting, that is, all that is great and important? (As it were all the buildings, leaving behind only bits of stone and rubble.) What we are destroying is nothing but houses of cards and we are clearing up the ground of language on which they stand.

Language disguises thought.

To convince someone of the truth, it is not enough to state it, but rather one must find the path from error to truth.