In the development of mankind as a whole, just as in individuals, love alone acts as the civilizing factor in the sense that it brings a change from egoism to altruism.

Love and work are the cornerstones of our humanness.

Psychoanalysis is in essence a cure through love.

Like the physical, the psychical is not necessarily in reality what it appears to us to be.

Neither in my private life nor in my writings, have I ever made a secret of being an out-and-out unbeliever.

Just as a cautious businessman avoids investing all his capital in one concern, so wisdom would probably admonish us also not to anticipate all our happiness from one quarter alone.

But the less a man knows about the past and the present the more insecure must prove to be his judgment of the future.