There is something else that makes the symptoms appear remarkable and inexplicable as a means of libidinous satisfaction. They in no way recall anything from which we normally are in the habit of expecting satisfaction. They usually require no object, and thereby give up all connection with external reality. We understand this to be a result of turning away from fact and of returning to the predominance of pleasurable gratification. But it is also a return to a sort of amplified autoeroticism, such as was yielded the sex impulse in its earliest satisfactions. In the place of a modification in the outside world, we have a physical change, in other words, an internal reaction in place of an external one, an adjustment instead of an activity. Viewed from a phylogenetic standpoint, this expresses a very significant regression. We will grasp this better when we consider it in connection with a new factor which we are still to discover from the analytic investigation of symptom development. Further, we recall that in symptom formation the same processes of the unconscious have been at work as in dream formation--elaboration and displacement. Similarly to the dream, the symptom represents a fulfillment, a satisfaction after the manner of the infantile; by the utmost elaboration this satisfaction can be compressed into a single sensation or innervation, or by extreme displacement it may be restricted to a tiny element of the entire libidinous complex. It is no wonder that we often have difficulties in recognizing in the symptom the libidinous satisfaction which we anticipate and always find verified.