With my full philosophical rucksack I can only climb slowly up the mountain of mathematics.

In order to be able to set a limit to thought, we should have to find both sides of the limit thinkable (i.e. we should have to be able to think what cannot be thought).

Telling someone something he does not understand is pointless, even if you add that he will not be able to understand it.

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.

Genius is talent exercised with courage.

For life in the present there is no death. Death is not an event in life. It is not a fact in the world.

When one is frightened of the truth then it is never the whole truth that one has an inkling of.