What saved me then? Nothing but pregnancy. And each time after I had given birth to my work my life hung suspended by a thin thread.

It is no doubt possible to fly--but first you must know how to dance like an angel.

Only with the ultimate knowledge of all things will man have come to know himself. For things are but the boundaries of man.

He who has always spared himself much will in the end become sickly of so much consideration. Praised be what hardens!

I fly in dreams, I know it is my privilege, I do not recall a single situation in dreams when I was unable to fly. To execute every sort of curve and angle with a light impulse, a flying mathematics - that is so distinct a happiness that it has permanently suffused my basic sense of happiness.

There is always a certain noise in applause: even in the applause we give ourselves.

Once and for all, there are many things I choose not to know.--Wisdom sets limits even to knowledge.