Illusions commend themselves to us because they save us pain and allow us to enjoy pleasure instead. We must therefore accept it without complaint when they sometimes collide with a bit of reality against which they are dashed to pieces.
The interpretation of dreams is the royal road to a knowledge of the unconscious activities of the mind.
Being entirely honest with oneself is a good exercise.
The psychical, whatever its nature may be, is itself unconscious.
What we call happiness in the strictest sense comes from the (preferably sudden) satisfaction of needs which have been dammed up to a high degree.
The first requisite of civilization is that of justice.