We must reckon with the possibility that something in the nature of the sexual instinct itself is unfavorable to the realization of complete satisfaction.
Sigmund FreudThe expectation that every neurotic phenomenon can be cured may, I suspect, be derived from the layman's belief that the neuroses are something quite unnecessary which have no right whatever to exist. Whereas in fact they are severe, constitutionally fixed illnesses, which rarely restrict themselves to only a few attacks but persist as a rule over long periods throughout life.
Sigmund FreudAdolescent stage in the development of the human race from which humanity should free itself.
Sigmund Freud