But we have not yet reached a distinctly morbid state. This dissociation may be slight, and of little consequence; and may even be completely "healed" without the knowledge of the patient; without his knowledge that anything strange has taken place at all--just as tubercular lesions of the lungs may be healed without the patient ever having known that he had suffered from tuberculosis. The co-conscious stream may again be diverted into the main, healthy channel; the threads of the wounded mind may again be bound up, with only a scar to indicate where the delicate protective covering had been ruptured. If such is the case, all is well thenceforward. But the termination of the accident may not be so fortunate. If, as before said, the cleavage be deep and lasting; and if, instead of attempting to bind up the wounded mind, those practices which caused the original "split" be persisted in; if shock follow shock--to the mental, moral, emotional, or physical nature; if great exhaustion, lack of sleep, or of proper food, or other causes of a like nature, be present--then it is evident that the cleavage must become deeper and deeper yet; and, in a short time, the few stray, wandering thoughts become grouped and bound together, and begin to form a veritable psychological entity. A secondary, an alien self, has been formed. And just as it is increasingly difficult to dam-up a river which has once found its way to some unaccustomed channel, so this secondary stream of consciousness will soon become a rushing, mighty torrent, incapable of being checked or dammed in its mad course. So long as this split-off portion remains a mass of sporadic thoughts, not much damage has been done; but when they become abnormally linked or associated together, forming groups, then the abnormal conditions have begun in earnest. These masses of subconscious experiences are called "complexes," and give rise to all sorts of trouble. It must not be thought that this complex formation is always harmful; on the contrary, this very process, when normally conducted, is the basis of our educational processes. But when they are thus conglomerated and consolidated outside the conscious mind, and function automatically, involuntarily, by themselves, then they have become dangerous to the mental stability. Their pressure and influence may be felt in the conscious life--in fantastic imaginations, in fears, phobias, and obsessions--in morbid dreams--in morbid emotional and moral reactions throughout the entire psycho-physical life. It is these automatic, self-acting complexes which originate many of the disorders of the mind. How, then, are we to diagnose this condition when once it has been reached; and, when once diagnosed, how is it to be treated? These are the all-important questions which modern psychological students have set themselves to solve, with more or less success. As briefly as may be, these are the methods.