Now since mental attitudes so react upon bodily states, whatever strongly controls mental attitudes becomes a very great factor in mental healing. There is a long line of testimony that what may be called the complex of faith does just this with unique power, for faith implies supernatural intervention. If there be anywhere an all-prevailing power whose word is law and we could really be persuaded that such a power had really intervened--even if it actually had not--on our behalf and brought its supernatural resource to bear upon our troubled case, then we should have a confidence more potent in the immediate transformation of mental attitudes than anything else we could possibly conceive. If we really believed such a power were ready to help us, if we as vividly expected its immediate help, then we might anticipate the utmost possible therapeutic reaction of mind upon body. A faith so called into action should produce arresting results, and this as a matter of investigation is true. In following through the theories of faith healing we may take here either of two lines. The devout may assert a direct divine interposition. God is. He has the power and the will; all things are plastic to His touch; He asks only faith and, given faith enough, the thing is done and there is no explaining it. Those who believe this are not inclined to reason about it; in fact it is beyond reason save as reason posits a God who is equal to such a process and an order in which such results can be secured. This is rather an achievement of faith than reason but the Christian Church generally has held such a faith--a faith sustained by the testimony which favours it and unaffected by the testimony which challenges it. The scientific temper which seeks economy in all its explanations and asks only for a cause sufficient for the effect and which is, moreover, constantly trying to relate the unknown to the known, takes another line and finds in faith healing just one more illustration of the power of mind over body. This does not exclude God but it discovers Him in resident forces and finds in law the revelation of His method. The conclusions, then, to which we are generally coming may not only be reconciled with a devout faith, they may, when followed through, enrich faith; but they do subdue the whole great matter to a sequence of cause and effect and they are gradually finding a satisfactory explanation for what has heretofore been deeply involved in mystery.