"The modern individual lives in a constant tension between freedom and necessity."

"He is educated who knows how to find out what he doesn't know."

"The psychological basis of the metropolitan type of individuality consists in the intensification of nervous stimulation which results from the swift and uninterrupted change of outer and inner stimul…"

"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…"

"The value of an idea is not in its truth, but in its power to transform."