For the present we have still to discuss various aspects of regression. With the knowledge you have gained concerning the development of the function of libido, you must expect two kinds of regression: incestuous return to the first libidinous objects and return of the entire sexual organization to an earlier stage of development. Both occur in the transference neuroses and play an important part in its mechanism. Especially is the return to the first incestuous objects of libido a feature that the neurotic exhibits with positively tiresome regularity. We could say far more about regression of libido if we took into consideration another group of neuroses: neurotic narcism. But we cannot do this now. These conditions give us a clue to other stages of development of the function of libido, which have not been mentioned previously, and correspondingly show new kinds of regression. But I think the most important task before me at this point is to warn you not to confuse _regression_ and _suppression_, and aid you to see clearly the connection between the two processes. Suppression, as you know, is the process by which an act capable of becoming conscious, in other words, an act that belongs to the fore-conscious system, is rendered unconscious and accordingly is thrust back into the unconscious system. Similarly we speak of suppression when the unconscious psychic act never has been admitted into the adjoining fore-conscious system but is arrested by the censor at the threshold. Kindly observe that the conception of suppression has nothing to do with sexuality. It describes a purely psychological process, which could better be characterized by terming it _localized_. By that we mean that it is concerned with the spatial relationships within the psyche, or if we drop this crude metaphor, with building up the psychological apparatus out of separate, psychic systems.