DISEASES OF THE SELF-PRESERVATION INSTINCT
The self-preservation instinct, having its source in the sense of individuality, of separateness, is the motive of our self-assertion. It is necessary that each member of a herd should have a certain amount of self-assertiveness in order to maintain his place among his fellows. If, however, this quality is above or below the requisite standard, his survival will be endangered; if, on the one hand, he is lacking in self-assertion, he will not obtain his fair share of the means of life available for the group of which he is a member. On the other hand, if his self-assertion is excessive, it may disrupt the social organisation, and either lead to the extinction of the group, or to his ejection from it.
Lack of self-preservation instinct is usually due to deep-seated psycho-pathologies, too complex to be entered upon here; but we may say in passing that this failure is often due to a division of aims in the subconscious mind, the individual is not sure which self he ought to preserve, and so preserves neither.
An excess of self-preservation is often developed in the child who has had a hard struggle to find and express his individuality.
The self-preservation instinct has a great influence upon vitality. All observant persons must have noticed how easily the man who has lost his hold upon life, or has given up hope, succumbs to disease.
The Machinery of the Mind · The Wunder Library — complete classics, free to read, with narration.