In what way shall we now account for the observation that the patient so energetically resists our attempts to rid him of his symptoms and to make his psychic processes function in a normal way? We tell ourselves that we have here come up against strong forces which oppose any change in the condition; furthermore, that these forces must be identical with those which originally brought about the condition. Some process must have been functional in the building up of these symptoms, a process which we can now reconstruct by means of our experiences in solving the meaning of the symptoms. We already know from Breuer's observations that the existence of a symptom presupposes that some psychic process was not carried to its normal conclusion, so that it could not become conscious. The symptom is the substitute for that which did not take place. Now we know where the forces whose existence we suspect must operate. Some violent antagonism must have been aroused to prevent the psychic process in question from reaching consciousness, and it therefore remained unconscious. As an unconscious thought it had the power to create a symptom. The same struggle during the analytic treatment opposes anew the efforts to carry this unconscious thought over into consciousness. This process we felt as a resistance. That pathogenic process which is made evident to us through the resistance, we will name _repression_. We are now ready to obtain a more definite idea of this process of repression. It is the preliminary condition for the formation of symptoms; it is also a thing for which we have no parallel. If we take as prototype an impulse, a psychological process which is striving to convert itself into action, we know that it may succumb before a rejection, which we call "repudiation" or "condemnation." In the course of this struggle, the energy which the impulse had at its disposal was withdrawn from it, it becomes powerless; yet it may subsist in the form of a memory. The whole process of decision occurs with the full knowledge of the ego. The state of affairs is very different if we imagine that this same impulse has been subjected to repression. In that case, it would retain its energy and there would be no memory of it left; in addition, the process of repression would be carried out without the knowledge of the ego. Through this comparison, however, we have come no nearer understanding the nature of repression.