Like the physical, the psychical is not necessarily in reality what it appears to us to be.
Sigmund FreudNo one who has seen a baby sinking back satiated from the breast and falling asleep with flushed cheeks and a blissful smile can escape the reflection that this picture persists as a prototype of the expression of sexual satisfaction in later life.
Sigmund FreudA civilization which leaves so large a number of its participants unsatisfied and drives them into revolt neither has nor deserves the prospect of a lasting existence.
Sigmund Freud