The philosophical I is not the human being, not the human body or the human soul with the psychological properties, but the metaphysical subject, the boundary (not a part) of the world.

If, for example, you were to think more deeply about death, then it would be truly strange if, in so doing, you did not encounter new images.

Language is a part of our organism and no less complicated than it.

If we were to imagine an orange on the blue side or green on the red side or violet on the yellow side, it would give us the same impression as a north wind coming from the southwest.

Don't for heaven's sake, be afraid of talking nonsense! But you must pay attention to your nonsense.

You get tragedy where the tree, instead of bending, breaks.

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.