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

No concept is a carrier of life.

Midlife is the time to let go of an overdominant ego and to contemplate the deeper significance of human existence.

New ideas are not only the enemies of old ones; they also appear often in an extremely unacceptable form.

We often dream about people from whom we receive a letter by the next post. I have ascertained on several occasions that at the moment when the dream occurred the letter was already lying in the post-office of the addressee.

Dreaming is a philogenetically older mode of thought.

Science has destroyed even the refuge of the inner life. What was once a sheltering haven has become a place of terror