These small things - nutrition, place, climate, recreation, the whole casuistry of selfishness - are inconceivably more important than everything one has taken to be important so far.

Only ideas won by walking have any value.

We operate with nothing but things which do not exist, with lines, planes, bodies, atoms, divisible time, divisible space - how should explanation even be possible when we first make everything into an image, into our own image!

Aphorisms should be peaks - and those who are addressed, tall and lofty. The air thin and pure, danger near, and the spirit full of gay sarcasm: these go well together.

I presume that you are compassionate: to be without pity means to be sick in body and spirit. But one should have spirit in abundance, so as to be permitted to be compassionate! For your pity is detrimental to you and to everyone.

Mystical explanations are thought to be deep; the truth is that they are not even shallow.

It was a subtle refinement of God to learn Greek when he wished to write a book – and that he did not learn it better.