Next let us note that psychologists always adduce the same examples when they wish to illustrate on the one hand, the processes of the persistent, tenacious attention, and, on the other hand, the developmental labor without which creative work does not come to pass: "Genius is only long patience," the saying of Newton; "always thinking of it," and like expressions of d'Alembert, Helmholtz and others, because in the one case as in the other the fundamental condition is the existence of a fixed, ever-active idea, notwithstanding its relaxations and its incessant disappearances into the unconscious with return to consciousness.
(3) The extreme form, which from its nature is semi-morbid, becomes in its highest degree plainly pathological; the unifying principle changes to a condition of obsession.
The normal state of our mind is a plurality of states of consciousness (polyideism). Through association there is a radiation in every direction. In this totality of coexisting images no one long occupies first place; it is driven away by others, which are displaced in turn by still others emerging from the penumbra. On the contrary, in attention (relative monoideism) a single image retains first place for a long time and tends to have the same importance again. Finally, in a condition of obsession (absolute monoideism) the fixed idea defies all rivalry and rules despotically. Many inventors have suffered painfully this tyranny and have vainly struggled to break it. The fixed idea, once settled, does not permit anything to dislodge it save for the moment and with much pain. Even then it is displaced only apparently, for it persists in the unconscious life where it has thrust its deep roots.
At this stage the unifying principle, although it can act as a stimulus for creation, is no longer normal. Consequently, a natural question arises: Wherein is there a difference between the obsession of the inventor and the obsession of the insane, who most generally destroys in place of creating?
The nature of fixed ideas has greatly occupied contemporary alienists. For other reasons and in their own way they, too, have been led to divide obsession into two classes, the intellectual and emotional, according as the idea or the affective state predominates. Then they have been led to ask: Which of these two elements is the primitive one? For some it is the idea. For others, and it seems that these are the more numerous, the affective state is in general the primary fact; the obsession always rests on a basis of morbid emotion and in a retention of impressions.[34]
But whatever opinion we may hold on this point, the difficulty of establishing a dividing line between the two forms of obsession above mentioned remains the same. Are there characters peculiar to each one?
It has been said: "The physiologically fixed idea is normally longed for, often sought, in all cases accepted, and it does not break the unity of the self." It does not impose itself fatally on consciousness; the individual knows the value thereof, knows where it leads him, and adapts his conduct to its requirements. For example, Christopher Columbus.
The pathological fixed idea is "parasitic," automatic, discordant, irresistible. Obsession is only a special case of psychic disintegration, a kind of doubling of consciousness. The individual becomes a person "possessed," whose self has been confiscated for the sake of the fixed idea, and whose submission to his situation is wrought with pain.
In spite of this parallel the distinguishing criterion between the two is very vague, because from the sane to the delirious idea the transitions are very numerous. We are obliged to recognize "that with certain workers—who are rather taken up with the elaboration of their work, and not masters directing it, quitting it, and resuming it at their pleasure—an artistic, scientific, or mechanical conception succeeds in haunting the mind, imposing itself upon it even to the extent of causing suffering." In reality, pure psychology is unable to discover a positive difference between obsession leading to creative work and the other forms, because in both cases the mental mechanism is, at bottom, the same. The criterion must be sought elsewhere. For that we must go out of the internal world and proceed objectively. We must judge the fixed idea not in itself but by its effects. What does it produce in the practical, esthetic, scientific, moral, social, religious field? It is of value according to its fruits. If objection be made to this change of front we may, in order to stick to a strictly psychological point of view, state that it is certain that as soon as it passes beyond a middle point, which it is difficult to determine, the fixed idea profoundly troubles the mechanism of the mind. In imaginative persons this is not rare, which partly explains why the pathological theory of genius (of which we shall speak later) has been able to rally so many to its support and to allege so many facts in its favor.