The complete irresponsibility of man for his actions and his nature is the bitterest drop which he who understands must swallow.

The surest sign that two people no longer speak the same language is that both say ironic things to one another but that neither senses the irony.

Your highest thought, however, ye shall have it commanded unto you by me - and it is this: man is something that is to be surpassed.

In the mountains of truth, you never climb in vain.

No price is too high to pay for the privilege of owning yourself.

A great value of antiquity lies in the fact that its writings are the only ones that modern men still read with exactness.

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!