Not how the world is, but that it is, is the mystery.

I give no sources, because it is indifferent to me whether what I have thought has already been thought before me by another.

I am still at Trattenbach, surrounded, as ever, by odiousness and baseness. I know that human beings on the average are not worth much anywhere, but here they are much more good-for-nothing and irresponsible than elsewhere.

It is an hypothesis that the sun will rise tomorrow: and this means that we do not know whether it will rise.

It is love that believes the resurrection.

It seems to me that, in every culture, I come across a chapter headed 'Wisdom.' And then I know exactly what is going to follow: 'Vanity of vanities, all is vanity.'

The so-called law of induction cannot possibly be a law of logic, since it is obviously a proposition with a sense.--Nor, therefore, can it be an a priori law.