Catholic since it is certain that at the end of time, she, Science, will again join Faith, and become the latter's very humble slave! Voluntary blindness and impudent denial of things as evident as the sunlight, can no further go. But all the same the insignificant little book, the manual of truth travels on continuing its work, destroying error and building up the new world, even as the infinitesimal agents of life built up our present continents. In the sudden great enlightenment which had come on him Pierre at last felt himself upon firm ground. Has Science ever retreated? It is Catholicism which has always retreated before her, and will always be forced to retreat. Never does Science stop, step by step she wrests truth from error, and to say that she is bankrupt because she cannot explain the world in one word and at one effort, is pure and simple nonsense. If she leaves, and no doubt will always leave a smaller and smaller domain to mystery, and if supposition may always strive to explain that mystery, it is none the less certain that she ruins, and with each successive hour will add to the ruin of the ancient hypotheses, those which crumble away before the acquired truths. And Catholicism is in the position of those ancient hypotheses, and will be in it yet more thoroughly to-morrow. Like all religions it is, at the bottom, but an explanation of the world, a superior social and political code, intended to bring about the greatest possible sum of peace and happiness on earth. This code which embraces the universality of things thenceforth becomes human, and mortal like everything that is human. One cannot put it on one side and say that it exists on one side by itself, whilst Science does the same on the other. Science is total and has already shown Catholicism that such is the case, and will show it again and again by compelling it to repair the breaches incessantly effected in its ramparts till the day of victory shall come with the final assault of resplendent truth. Frankly, it makes one laugh to hear people assign a /role/ to Science, forbid her to enter such and such a domain, predict to her that she shall go no further, and declare that at this end of the century she is already so weary that she abdicates! Oh! you little men of shallow or distorted brains, you politicians planning expedients, you dogmatics at bay, you authoritarians so obstinately clinging to the ancient dreams, Science will pass on, and sweep you all away like withered leaves!