Finally, one other point of difference should be mentioned. It concerns the differentiation between psychological phenomena of want and those of abundance. The primitive level of human existence is that of want. There are imperative needs which have to be satisfied before anything else. Only when man has time and energy left beyond the satisfaction of the primary needs, can culture develop and with it those strivings that attend the phenomena of abundance. Free (or spontaneous) acts are always phenomena of abundance. Freud’s psychology is a psychology of want.