Man's will, sustained by an indominable conviction, is much more powerful than material forces that seem insurmountable.

I never think of the future - it comes soon enough.

Playfullness is the essential feature of productive thought.

Everybody acts not only under external compulsion but also in accordance with inner necessity.

I live in that solitude which is painful in youth, but delicious in the years of maturity.

The man with the greatest soul will always face the greatest war with the low minded person.

A religious person is devout in the sense that he has no doubt about the significance of those superpersonal objects and goals which neither require nor are capable of rational foundation