since men are equal and thus have the same wish for happiness, and since there is not enough wealth to satisfy them all to the same extent, they necessarily fight against each other and want power to secure the future enjoyment of what they have at present.

Progress in social psychology is necessary to counteract the dangers which arise from the progress in physics and medicine.

Freud was so imbued with the spirit of his culture that he could not go beyond certain limits which were set by it. These very limits became limitations for his understanding even of the sick individual; they handicapped his understanding of the normal individual and of the irrational phenomena operating in social life.

the key problem of psychology is that of the specific kind of relatedness of the individual towards the world and not that of the satisfaction or frustration of this or that instinctual need per se