"All these methods, _if one believes in them_, are good, and they prove by their success the law of suggestion. But the method that is based on a sure truth is the method of the scientist. He reasons with his patient, he stirs in him what moral or religious enthusiasm he can, and to these means he adds tactfully the subtle suggestive powers of his own presence and eloquence. This force, together with the power which is revealed in a man of correcting his own mental habits, is the greatest practical discovery of modern psychology.... Suggestive therapeutics is the use of suggestion to fix in the mind ideas of healthy mental habits.... "Our question is: can the physical conditions of the brain affect the physical condition of the stomach? We know that the brain-building condition which accompanies the idea of raising our hand can affect the condition of the muscles of our arm--and we call that a voluntary function. Now the question is whether the brain condition which accompanies the idea of enlivening our stomach can have an effect upon that involuntary function. Experiments with suggestion have proved that in some cases it can, if it continues long enough. Persons of a very suggestible nature, can, for instance, by concentrating their mind upon a certain part of the body, increase the flow of blood to that part, although the regulation of blood flow is supposed to be entirely involuntary. The action of the heart, also the movements of the digestive organs particularly, and of the organs of elimination, are almost directly affected in suggestible persons by that change in their brains which accompanies certain ideas.... Science has established then, that suggestion can effect to some extent, the so-called involuntary functions of the body; but the extent or limitation of these effects is by no means determined. It could not be determined scientifically without years of diligent experiment and tabulation. Any dogmatic statement upon one side or the other of that question, is therefore premature and against the spirit of science."