Secrecy involves a tension which, at the moment of revelation, finds its release.

The intellectually sophisticated person is indifferent to all genuine individuality, because relationships and reactions result from it which cannot be exhausted with logical operations.

Cities are, first of all, seats of the highest economic division of labor.

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 stimuli.

Every relationship between two individuals or two groups will be characterized by the ratio of secrecy that is involved in it.

Modern culture is constantly growing more objective. Its tissues grow more and more out of impersonal energies, and absorb less and less the subjective entirety of the individual.

The deepest problems of modern life derive from the claim of the individual to preserve the autonomy and individuality of his existence in the face of overwhelming social forces, of historical heritage, of external culture, and of the technique of life.