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

The philosopher is not a citizen of any community of ideas, that is what makes him a philosopher.

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

It is so characteristic, that just when the mechanics of reproduction are so vastly improved, there are fewer and fewer people who know how the music should be played.

The Christian religion is only for one who needs infinite help, therefore only for one who feels an infinite need. The whole planet cannot be in greater anguish than a single soul. The Christian faith - as I view it - is the refuge in this ultimate anguish. To whom it is given in this anguish to open his heart, instead of contracting it, accepts the means of salvation in his heart.

To think that you are not following a rule is to follow a rule.

Belief in the causal nexus is superstition.