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

Every relationship between persons causes a picture of each to take form in the mind of the other, and this picture evidently is in reciprocal relationship with that personal relationship.

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.

Secrecy sets barriers between men, but at the same time offers the seductive temptation to break through the barriers by gossip or confession.

In the immediate as well as the symbolic sense, in the physical as well as the intellectual sense, we are at any moment those who separate the connected, or connect the separate.

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

The individual has become a mere cog in an enormous organization of things and powers which tear from his hands all progress, spirituality, and value in order to transform them from their subjective form into the form of a purely objective life.