For every manifest case of insanity there are, in my estimation, at least ten latent cases who seldom get to the point of breaking out of openly but whose views and behavior, for all their appearance of normality are influenced unconsciously by pathological and perverse factors. There are, of course, no medical statistics on the frequency of latent psychoses – for understandable reasons. But even if their number should amount to less than ten times that of the manifest psychoses and of manifest criminality, the relatively small percentage of the population figures they represent is more than compensated for by the peculiar dangerousness of these people. Their mental state is that of a collectively excited group ruled by affective judgements and wish fantasies. In a milieu of this kind they are the adapted ones, and consequently they feel quite at home in it. They know from their own experience the language of these conditions, and they know how to handle them. Their chemical ideas, sustained by fanatical resentment, appeal to the collective irrationality and find fruitful soil there; they express all those motives and resentments which lurk in more normal people under the cloak of reason and insight. They are, therefore, despite their small number in comparison with the population as a whole, dangerous as a sources of infection precisely because the so-called normal person possesses only a limited degree of self-knowledge.
- Pg. 4, The Undiscovered Self – C.G. Jung, 9-780691-150512