It is much easier to bury a problem than to solve it.

There are, indeed, things that cannot be put into words. They make themselves manifest. They are what is mystical.

The truth of the thoughts that are here set forth seems to me unassailable and definitive. I therefore believe myself to have found, on all essential points, the final solution of the problems. And if I am not mistaken in this belief, then the second thing in which the value of this work consists is that it shows how little is achieved when these problems are solved.

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

If I have exhausted the justifications, I have reached bedrock and my spade is turned. Then I am inclined to say: 'This is simply what I do.

At the end of reasons comes persuasion.

At the core of all well-founded belief lies belief that is unfounded.