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

"The tragedy of culture is that objective culture, once created, becomes estranged from the subjective spirit that produced it."

"Conflict is designed to resolve divergent dualisms; it is a way of achieving some kind of unity."

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

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