The first proposition is that the mind of man is dual in character. This proposition, as we have already stated, has been more or less dimly recognized by many philosophers in all ages; and during the present century it has been gradually assuming a more definite status in mental philosophy. Assuming, therefore, this proposition to be true, it necessarily follows that the two minds must, normally, bear a harmonious relation to each other. It follows that one of the two minds must, normally, be subordinated to the other. Otherwise there would be a conflict. Just here Liébault's discovery of the law of suggestion comes in, and shows that the subjective mind is constantly controlled by that power. It is true that Liébault and his followers have applied the law only to the elucidation of hypnotic phenomena; and in that have not always carried it to its legitimate conclusion. But it has seemed to me that if the law is applicable to one class of psychic phenomena, it must be equally applicable to all, as nature's laws admit of no exceptions. I have therefore declared, as the second proposition of my hypothesis, that the subjective mind is always controllable by suggestion. Assuming, therefore, that these two propositions are true, it follows as a necessary consequence that there must be some distinctive line of difference between the methods of operation of the two minds. It is obvious that there is a limitation of power in the subjective mind, otherwise it could not be subordinated to the objective. Just where this line of distinction could be drawn, and how it could be formulated, was at first a perplexing question. There were no authorities on the subject who ever hinted at a possible limitation of reasoning power in either branch of the dual mind. On the contrary, those who have observed the phenomena of subjective mental activity, as seen in hypnotic subjects, in trance-speakers, and cognate exhibitions, have been so profoundly impressed with its transcendent powers that it has seemed impossible that it could be hedged about by limitations. Philosophers from time immemorial have recognized its tremendous powers of memory, and millions have sat entranced by the eloquence of subjective speakers, and noted with profound admiration their accuracy of logical deduction. So impressed has the world been by such exhibitions that the soul has been held up as the infallible guide to all that is pure and noble and good in humanity. It has been called the Ego (which it truly is), and as such it has been recognized as the inward monitor, whose monitions are always entitled to reverential consideration. It was difficult, therefore, to imagine any line of distinction between the two branches of the dual mind which would place the subjective in a subordinate position. But for the discovery of Liébault's law of suggestion that line would never have been recognized. It now becomes evident, however, that the point