The prerequisite for a good marriage ... is the license to be unfaithful.

Protection and security are only valuable if they do not cramp life excessively.

The seat of faith, however, is not consciousness but spontaneous religious experience, which brings the individual's faith into immediate relation with God.

I've realized that somebody who's tired and needs a rest, and goes on working all the same is a fool.

The distinction between mind and body is an artificial dichotomy, a discrimination which is unquestionably based far more on the peculiarity of intellectual understanding than on the nature of things.

Life calls us forth to independence, and anyone who does not heed this call because of childish laziness or timidity is threatened with neurosis. And once this has broken out, it becomes an increasingly valid reason for running away from life.

Space flights are merely an escape, a fleeing away from oneself, because it is easier to go to Mars or to the moon than it is to penetrate one's own being.