I can not say the same thing about the therapeutic procedure which we have proposed to our colleagues together with our theory. It still struggles for recognition. This may have its special reasons. The technique of the procedure was at that time still rudimentary. I was unable to give those indications to the medical reader of the book which would enable him to perform such a treatment. But surely there were other causes of a general nature. To many physicians psychotherapy even today appears as a product of modern mysticism, and in comparison to our physico-chemical remedies the application of which is based on physiological insight, psychotherapy appears quite unscientific and unworthy of the interest of a natural philosopher. You will therefore allow me to present to you the subject of psychotherapy, and to point out to you what part of this verdict can be designated as unjust or erroneous. In the first place let me remind you that psychotherapy is not a modern therapeutic procedure. On the contrary it is one of the oldest remedies used in medicine. In Lëwenfeld’s instructive work (Lehrbuch der gesamten Psychotherapie) you can find the methods employed in primitive and ancient medicine. Most of them were of a psychotherapeutic nature. In order to cure a patient he was transferred into a state of “credulous expectation” which acts in a similar manner even today. Even after the doctors found other remedial agents psychotherapeutic endeavors never disappeared from this or that branch of medicine. Secondly, I call your attention to the fact that we doctors really can not abandon psychotherapy if only because another very much to be considered party in the treatment—namely the patient—has no intention of abandoning it. You know how much we owe to the Nancy school (Liébault, Bernheim) for these explanations. Without our intention, an independent factor from the patient’s psychic disposition enters into the activity of every remedial agent introduced by the doctor, acting mostly in a favorable sense but often also in an inhibiting sense. We have learned to apply to this factor the word “suggestion,” and Moebius taught us that the failures of some of our remedies are to be ascribed to the disturbing influences of this very powerful moment. You doctors, all of you, constantly practice psychotherapy, even when you do not know it, or do not intend it, but it has one disadvantage, you leave entirely to the patient the psychic factor of your influence. It then becomes uncontrollable, it can not be divided into doses and can not be increased. Is it not a justified endeavor of the doctor to become master of this factor, to make use of it intentionally, to direct and enforce it? It is nothing other than that, that scientific psychotherapy expects of you.