And of exactly the same sort is the bewilderment which falls to the lot of the scientist who is honest and willing to face the facts. The bio-chemist with his test tubes and his microscopes and his complex apparatus of research sits himself down and accumulates a mass of information about the human body. He investigates the diseases of the body and learns in detail just how these diseases spread and sometimes how they are caused; he can present you with a diagnosis, showing the exact stage to which the degeneration of a certain organ has proceeded, and perhaps he can suggest to you a change of diet or some drug which will, for a time at least, check the process of the breakdown. But in other cases he will be perfectly helpless; he will be, as it were, buried under the mass of detail which he has accumulated; he will find the vital energy depressed, and he will not know any way to renew it. But along will come some mental specialist, who in a half hour's talk with the patient, by a simple change in the patient's _ideas_, will completely make over the patient's life, and set going a new vital process which will restore the body to its former health. A religious enthusiast may do this, a psychotherapist may do it, a moral genius may do it; and the physician with all his learning will find himself like a man on the outside of a house, peering in through the windows and trying in vain to find out something about the life of the family and its guests. This is humiliating to the chemist and the medical man, but they have to face it, because it is a fact. In the seat of authority over the human body there sits a higher being which, without any religious implications, we may call the soul; or, if it is impossible to get away from the religious implication of that word, we will call it the consciousness, or the personality. This master of the house of life is in many ways dependent upon the house. If the furnace goes out he freezes, and if the house takes fire and burns up--well, he disappears and leaves no address. But in other ways the master of the house is really master, and is a worker of miracles. He does things which we do not at all understand, and cannot yet even foresee, but which often completely make the house over.