The entification of images is still more direct and powerful because in this morbid crisis the necessary corrections made by reason cannot take place, since the sick man is for the time deprived of it, and he is in fact a dreamer, whose condition is intensified by abnormal excitement. Entification is now displayed in its nude and native state, and serves to explain the constant mental process, and the true nature of the representations of the intellect. The transition is easy from delirium to madness, for although an insane person is not always delirious, but sometimes calm and composed, yet there is a fundamental resemblance to delirium in the change in his states of consciousness and its relative organs, which imply a constant hallucination. The most famous and acute physicians of the insane estimate that eighty out of a hundred insane persons are subject to hallucinations. The morbid condition which generates them is also produced by debility, by anaemia, and the senile decay of the cerebral organs, since they occur in dementia, idiocy, and old age, and the physiological and mental causes are the same; the power of fixing the attention and governing the thoughts is diminished, owing to the weakening of the vivid consciousness of the external world, produced by a torpidity of the afferent organs. In these cases the recollections which are not altogether lost sometimes reappear as hallucinations. The hallucinations of madness, in its various forms of dementia, idiocy, and dotage, are all, apart from their morbid and organic conditions, derived from the same source which produces myths, dreams, and normal hallucinations; the objective entification of images is due to the innate faculty of the perception, which leads to the immediate personification of any given phenomenon. We have shown that, given a sensation, there naturally arises the implicit notion of a subject and a cause, and this natural impulse is further developed by the influence of heredity; both in man and animals the constant and powerful sense of individual life is infused into the phenomenon perceived.