"No one who has tasted the forbidden fruit of knowledge can ever again be satisfied with the primitive bliss of ignorance."

"Neurotics build castles in the air, psychotics live in them, and psychiatrists collect the rent."

"The tendency to aggression is an innate, independent, instinctual disposition in man... it constitutes the most powerful obstacle to culture."

"The ego is not master in its own house."

"What is common in all these situations is the use of the unconscious as a means of communication."