It is in the very nature of things that religion and common sense should hate and oppose each other. They are rivals for the same prize--aspirants to the same throne. In every age a conflict has been going on between them; and although common sense is fast getting the upper hand to-day, the war is far from ended, and we may see some fierce struggles before the combat closes. There can, however, be no doubt as to the issue; for science has appeared on the scene with the most deadly weapons of destruction, and science is the sworn ally of common sense. Nay, is not Science the mighty child of common sense--the fruit of Reason from the lusty embrace of Nature? Common sense is primitive logic. It does not depend on books, and it is superior to culture. It is the perception of analogy--the instinct of causation. It guides the savage through trackless forests, and the astronomer through infinite space. It makes the burnt child dread the fire, and a Darwin see in a few obvious facts the solution of a mystery. It built the first hut and the last palace; the first canoe and the last ocean steamer. It constructed docks, and laid down railways, applied steam to machinery and locomotion, prompted every mechanical discovery, instigated all material progress, and transformed an ape-like beast into a civilised man. Even the highest art is full of common sense. Sanity and simplicity are the distinguishing marks of the loftiest genius, which may be described as inspired common sense. The great artist never loses touch of fact; he may let his imagination soar as high as the stars, but he keeps his feet firm-planted on the ground. All the world recognises the sublimity of Greek sculpture and Shakespeare's plays, because they are both true to nature and fact and coincident with everlasting laws. The true sublime is not fantastic; it is solid and satisfying, like a mighty Alp, deep-rooted first of all in the steadfast earth, and then towering up with its vineyards, its pastures, its pine-forests, its glaciers, its precipices, and last of all the silence of infinitude brooding over its eternal snows. Common sense, the civiliser, has had an especially hard fight with that particular form of religion known as Christianity. When Tertullian said that Christianity was to be believed because it was incredible, he spoke in the true spirit of faith; just as old Sir Thomas Browne did when he found the marvels of religion too weak for his credulity, David Hume expressed the same truth ironically at the conclusion of his _Essay on Miracles_, when he said that it was not reason that persuaded any Christian of the truth of his creed, which was established on the higher ground of faith, and could not be accepted without a miracle.