True indeed; Religion has never realized how impregnable are many of its positions. It has not yet been placed on that basis which would make them impregnable. And in a transition period like the present, holding Authority with one hand, the other feeling all around in the darkness for some strong new support, Theology is surely to be pitied. Whence this dread when brought face to face with Science? It cannot be dread of scientific fact. No single fact in Science has ever discredited a fact in Religion. The theologian knows that, and admits that he has no fear of facts. What then has Science done to make Theology tremble? It is its method. It is its system. It is its Reign of Law. It is its harmony and continuity. The attack is not specific. No one point is assailed. It is the whole system which when compared with the other and weighed in its balance is found wanting. An eye which has looked at the first cannot look upon this. To do that, and rest in the contemplation, it has first to uncentury itself. Herbert Spencer points out further, with how much truth need not now be discussed, that the purification of Religion has always come from Science. It is very apparent at all events that an immense debt must soon be contracted. The shifting of the furnishings will be a work of time. But it must be accomplished. And not the least result of the process will be the effect upon Science itself. No department of knowledge ever contributes to another without receiving its own again with usury--witness the reciprocal favors of Biology and Sociology. From the time that Comte defined the analogy between the phenomena exhibited by aggregations of associated men and those of animal colonies, the Science of Life and the Science of Society have been so contributing to one another that their progress since has been all but hand-in-hand. A conception borrowed by the one has been observed in time finding its way back, and always in an enlarged form, to further illuminate and enrich the field it left. So must it be with Science and Religion. If the purification of Religion comes from Science, the purification of Science, in a deeper sense, shall come from Religion. The true ministry of Nature must at last be honored, and Science take its place as the great expositor. To Men of Science, not less than to Theologians, "Science then Shall be a precious visitant; and then, And only then, be worthy of her name; For then her heart shall kindle, her dull eye, Dull and inanimate, no more shall hang Chained to its object in brute slavery; But taught with patient interest to watch The process of things, and serve the cause Of order and distinctness, not for this Shall it forget that its most noble use, Its most illustrious province, must be found In furnishing clear guidance, a support, Not treacherous, to the mind's _excursive_ power."[20]