In accordance with the above exposition one may thus regard the origin of madness as a violent “casting out of the mind” of anything, which, however, is only possible by “taking into the head” something else. The converse process is more rare, that the “taking into the head” comes first, and the “casting out of the mind” second. It takes place, however, in those cases in which the occasion of insanity is kept constantly present to the mind and cannot be escaped from; thus, for example, in the case of many who have gone mad from love, erotomaniacs, where the occasion of their madness is constantly longed after; also in the case of madness which has resulted from the fright of some sudden horrible occurrence. Such patients cling, as it were, convulsively to the thought they have grasped, so that no other, or at least none opposed to it, can arise. In both processes, however, what is essential to madness remains the same, the impossibility of a uniformly connected recollection, such as is the basis of our healthy and rational reflection. Perhaps the contrast of the ways in which they arise, set forth here, might, if applied with judgment, afford a sharp and profound principle of division of delusions proper. For the rest, I have only considered the physical origin of madness, thus what is introduced by external, objective occasions. More frequently, however, it depends upon purely physical causes, upon malformations or partial disorganisation of the brain or its membranes, also upon the influence which other parts affected with disease exercise upon the brain. Principally in the latter kind of madness false sense‐perceptions, hallucinations, may arise. Yet the two causes of madness will generally partake of each other, particularly the psychical of the physical. It is the same as with suicide, which is rarely brought about by an external occasion alone, but a certain physical discomfort lies at its foundation; and according to the degree which this attains to a greater or less external occasion is required; only in the case of the very highest degree is no external occasion at all required. Therefore there is no misfortune so great that it would influence every one to suicide, and none so small that one like it has not already led to it. I have shown the psychical origin of madness as, at least according to all appearance, it is brought about in the healthy mind by a great misfortune. In the case of those who are already strongly disposed to madness physically a very small disappointment will be sufficient to induce it. For example, I remember a man in a madhouse who had been a soldier, and had gone out of his mind because his officer had addressed him as _Er_.(16) In the case of decided physical disposition no occasion at all is required when this has come to maturity. The madness which has sprung from purely psychical causes may, perhaps, by the violent perversion of the course of thought which has