May we not recognise in this great fact of human nature a sure index of a great corresponding truth? Can we avoid taking it as a clear token of the reality of revelation; as a kind of immediate and spontaneous evidence on the part of nature that there is and always has been in this lower world some positive knowledge of that which far transcends it, some real apprehension of the mystery that enfolds the universe? a knowledge and an apprehension which, however imperfect and fragmentary, however fitful and fluctuating, however blurred in outline and lost in infinite shadow, is yet incomparably more and better than none at all. Are we not, in short, morally driven upon the conviction that this powerful instinct of our nature is neither blind nor aimless; that its Object is a true, substantive Being; and that this Being has discovered, and yet discovers, some precious glimpses of Himself and His essential character to the spirit of mortal man? It must be so, unless we admit that the soul's dearest desires are a mocking illusion, that her aspirations towards a truth and a goodness of superhuman perfection are moonshine and madness. It cannot be nothingness that avails to evoke the deepest and purest emotions of our nature; not mere vacuity and chaos, wearing the semblance of an azure heaven. It is not into a measureless waste of outer darkness that we reach forth trembling hands. Surely the spirit of denial is the spirit that fell from heaven, and the best and highest of man's thoughts aim at and affirm something positive, something that is, and the soul thirsts after God, the Living God. We hear much in these days of our physical nature. The microscopic investigations of science leave nothing unexamined, nothing unexplored, so far as the visible organism is concerned. Rays from many distinct sources converge to throw an ever-increasing light upon the mysteries of our bodily constitution. In all this, science presents to the devout mind a valuable subsidiary revelation of the power and goodness of the Creator. But science cannot advance alone one step beyond the things of time and sense; her facts belong exclusively to the material order of existence; her cognition is limited to the various modes and conditions of force that constitute the realm of sight and touch; she cannot climb above these to a higher plane of being. And small blame it is to science, that she thus lacks the power of overstepping her natural boundaries. The evil begins when the men of science venture, in her much-abused name, to ignore and deny realities not amenable to scientific tests, and immeasurably transcending all merely physical standards and methods.