- nation, a definite quantity was used up in the mechanisms of
mutual attraction and of protection of offspring. This transference of sexual libido from the sexual sphere to associated functions is still taking place (e. g., modern neo-Malthusianism is the artificial continuation of the natural tendency). We call this process sublimation, when this operation occurs without injury to the adaptation of the individual; we call it repression—when the attempt fails. From the descriptive standpoint psychoanalysis accepts the multiplicity of instincts, and, among them, the instinct of sexuality as a special phenomenon, moreover, it recognizes certain affluxes of the libido to asexual instincts.
From the genetic standpoint it is otherwise. It regards the multiplicity of instincts as issuing out of relative unity, the primitive libido. It recognizes that definite quantities of the primitive libido are split off, associated with the recently created functions, and finally merged in them. From this standpoint we can say, without any difficulty, that patients with dementia præcox withdraw their "libido" from the external world and in consequence suffer a loss of reality, which is compensated by an increase of the phantasy-building activities.
We must now fit the new conception of libido into that theory of sexuality in childhood which is of such great importance in the theory of neurosis. Generally speaking, we first find the libido as the energy of vital activities acting in the zone of the function of nutrition. Through the rhythmical movements in the act of sucking, nourishment is taken with all signs of satisfaction. As the individual grows and his organs develop, the libido creates new ways of desire, new activities and satisfactions. Now the original model—rhythmic activity, creating pleasure and satisfaction—must be transferred to other functions which have their final goal in sexuality.
This transition is not made suddenly at puberty, but it takes place gradually throughout the course of the greater part of childhood. The libido can only very slowly and with great difficulty detach itself from the characteristics of the function of nutrition, in order to pass over into the characteristics of sexual function. As far as I can see, we have two epochs during this transition, the epoch of sucking and the epoch of the displaced rhythmic activity. Considered solely from the point of view of its mode
