"In order to accommodate to change and to the contrast of phenomena, the intellect does not require any shocks and inner upheavals; it is only through such upheavals that the more conservative mind cou…"

"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…"

"Music and love are the only accomplishments of humanity which do not, in an absolute sense, have to be called attempts with unsuitable means."

"The deepest secret of life is that it has no secret."

"The crowd is a temporary madness that allows individuals to escape their solitude."