For the present we will keep to the question of regression. After what you have heard about the development of the Libido you may anticipate two kinds of regression; a return to the first objects invested with Libido, which we know to be incestuous in character, and a return of the whole sexual organization to earlier stages. Both kinds occur in the transference neuroses, and play a great part in their mechanism. In particular, the return to the first incestuous objects of the Libido is a feature found with quite fatiguing regularity in neurotics. There is much more to be said about the regressions of Libido if another group of neuroses, called the narcissistic, is taken into account; but this is not our intention at the moment. These affections yield conclusions about other developmental processes of the Libido-function, not yet mentioned, and also show us new types of regression corresponding with them. I think, however, that I had better warn you now above all not to confound _Regression_ with _Repression_ and that I must assist you to clear your minds about the relation between the two processes. _Repression_, as you will remember, is the process by which a mental act capable of becoming conscious (that is, one which belongs to the preconscious system) is made unconscious and forced back into the unconscious system. And we also call it _repression_ when the unconscious mental act is not permitted to enter the adjacent preconscious system at all, but is turned back upon the threshold by the censorship. There is therefore no connection with sexuality in the concept ‘_repression_’; please mark this very carefully. It denotes a purely psychological process; and would be even better described as _topographical_, by which we mean that it has to do with the spatial relationships we assume within the mind, or, if we again abandon these crude aids to the formulation of theory, with the structure of the mental apparatus out of separate psychical systems.