That is to say, the subjective mind accepts, without hesitation or doubt, every statement that is made to it, no matter how absurd or incongruous or contrary to the objective experience of the individual. If a subject is told that he is a dog, he will instantly accept the suggestion, and, to the limit of physical possibility, act the part suggested. If he is told that he is the President of the United States, he will act the part with wonderful fidelity to life. If he is told that he is in the presence of angels, he will be profoundly moved to acts of devotion. If the presence of devils is suggested, his terror will be instant, and painful to behold. He may be thrown into a state of intoxication by being caused to drink a glass of water under the impression that it is brandy; or he may be restored to sobriety by the administration of brandy, under the guise of an antidote to drunkenness. If told that he is in a high fever, his pulse will become rapid, his face flushed, and his temperature increased. In short, he may be made to see, hear, feel, smell, or taste anything, in obedience to suggestion. He may be raised to the highest degree of mental or physical exaltation by the same power, or be plunged by it into the lethargic or cataleptic condition, simulating death. These are fundamental facts, known and acknowledged by every student of the science of hypnotism. There is another principle, however, which must be mentioned in this connection, which is apparently not so well understood by hypnotists generally. I refer to the phenomenon of auto-suggestion. Professor Bernheim and others have recognized its existence, and its power to modify the results of experiments in one class of hypnotic phenomena, but apparently have failed to appreciate its full significance. It is, in fact, of coextensive importance with the general principle, or law, of suggestion, and is an essential part of it. It modifies every phenomenon, and sometimes seems to form an exception to the general law. Properly understood, however, it will be seen, not only to emphasize that law, but to harmonize all the facts which form apparent exceptions to it.