However, a withdrawal of libido is not an exclusive occurrence in paranoia, nor is its occurrence anywhere necessarily followed by disastrous consequences. Indeed, in normal life there is a constant withdrawal of libido from persons and objects without resulting in paranoia or other neuroses. It merely causes a special psychic mood. The withdrawal of the libido as such cannot therefore be considered as pathogenic of paranoia. It requires a special character to distinguish the paranoiac withdrawal of libido from other kinds of the same process. This is readily found when we follow the further utilization of the libido thus withdrawn. Normally, we immediately seek a substitute for the suspended attachment, and until one is found the libido floats freely in the psyche and causes tensions which influence our moods. In hysteria the freed sum of libido becomes transformed into bodily innervations of fear. Clinical indications teach us that in paranoia a special use is made of the libido which is withdrawn from its object ... the freed libido in paranoia is thrown back on the ego and serves to magnify it. Note the fact that there is a necessary relation between the fixed ideal system of the paranoiac and his withdrawal of interest in the outside world. The system gains the function of reality for him in the same measure that, loving not the world nor the things that are in the world, he has rendered our common human world unreal. His love thrown back upon himself causes him to create another world, a world of "pure reason," so to speak, which is more congenial to him than the world of empirical fact. In this system he takes refuge and finds peace at last. Now we see the function, at least so far as paranoia is concerned, of the ideal system. As Brill says, it is a curative process of a mind which has suffered "regression" or turning back of its interest from the affairs of ordinary men and women, to the attachments of an earlier stage in its history. To use a philosophical term, the paranoiac is the Simon-pure "solipsist." And as _a priori_ thinking tends, as Schiller has shown, ever to solipsism, we see here the grain of truth in G. K. Chesterton's witty comparison of rationalism and lunacy. "Regression," or withdrawal of the libido, is present to some degree I believe in all forms of the neurosis. But we are informed that a withdrawal of the libido may, and frequently does, occur also in normal people. Knowledge of the neurosis here, as elsewhere, serves to throw light on certain thought processes of people who are considered normal. Brill says that "normally we seek a substitute for the suspended attachment." New interests and new affections in time take the places of the objects from which the feelings have been torn. In analytical psychology the process by which this is achieved is called a "transference."