Of what is great one must either be silent or speak with greatness. With greatness--that means cynically and with innocence.

We do not belong to those who only get their thought from books, or at the prompting of books, -- it is our custom to think in the open air, walking, leaping, climbing, or dancing on lonesome mountains by preference, or close to the sea, where even the paths become thoughtful.

You must be born for your physician, otherwise you are bound to perish because of your physician.

The best way to give assistance to those who are deeply embarrassed and to calm them down is to praise them decisively.

Necessity is not an established fact, but an interpretation.

I still live, I still think: I still have to live, for I still have to think.

You must climb above yourself-up and beyond, until you have even your stars under you.