The primitive stages can always be re-established; the primitive mind is, in the fullest meaning of the word, imperishable.

The psychical, whatever its nature may be, is itself unconscious.

The unconscious of one human being can react upon that of another without passing through the conscious.

A belligerent state permits itself every such misdeed, every such act of violence, as would disgrace the individual.

Only a good-for-nothing is not interested in his past.

Maturity is the ability to postpone gratification.

If you want to endure life, prepare yourself for death.