"The most important things are not to be found in the conscious, but in the unconscious."

"The tragedy of the modern individual is that he is too much himself and not enough of the world."

"The human being is a bridge between two abysses: nature and spirit."

"The metropolis exacts from man a different kind of consciousness than does rural life."

"The brutality of a man purely motivated by monetary considerations … often does not appear to him at all as a moral delinquency, since he is aware only of a rigorously logical behavior, which draws th…"