[Footnote 12: Excessive emotional reactions upon bodily states may explain, as Cannon suggests, the more obscure phenomena of religious frenzy such as the ceremonial dances of savages, the "Danse Macabre" of the Middle Ages, the feats of the whirling dervishes, the jumping and shouting of revivalism; also, maybe, the modern jazz.] _The Two Doors_ There are other changes as well. The breath is quickened, the lungs are expanded, waste products are very much more rapidly eliminated and so in answer to summoning states of the soul the body as a whole readjusts itself in marvellous subtle forms, mobilizing all its forces for the contests which the emotion anticipates, or indeed which the emotion itself calls out. And if all this seems unduly technical it is only to bear out with something like a scientific accuracy the statements made a little earlier that two orders meet and merge within us and that the reactions of our loves, our fears, or our longings upon our bodily processes may be stated in terms of the test tube and the chemist's scale. Such changes as are thus registered react in turn upon mental attitudes. Fatigue produces mental depression. An accumulation of uneliminated waste darkens all our horizons; irritability of mind and soul attend physical irritability; any unhappy modification in the balance of the physical registers automatically an equally unhappy modification in the balance of the psychic. Most of us, as we come to know ourselves better, recognize marked alterations even in spiritual states which we are taught to refer to physical condition, but just as truly altered spiritual conditions produce altered physical states. There is an endless give and take and there are, therefore, two doors of approach to our pains, wearinesses and sicknesses. _The Challenge of Hypnotism_ Medicine, surgery and hygiene as at present organized largely approach personal well-being from the physical side. They have for their support a body of fact and a record of accomplishment which cannot be put out of court without sheer intellectual stultification. Modern medicine has been so massively successful in dealing with disease on the basis of a philosophy which makes everything, or nearly everything, of the body and nothing or next to nothing of the mind, that medicine was in danger of becoming more sheerly materialistic than almost any other of our sciences; Physics and Chemistry had their backgrounds in which they recognized the interplay of realities too great for their formulae and forces too subtle for their most sensitive instruments. But medicine was almost in the way of forgetting all this when it was compelled--and that for its own good--to take account of an entirely different set of forces.