We often hear it said that the world is constantly becoming more and more enlightened, and that this enlightening must be favorable to Protestantism and unfavorable to Catholicism. We wish that we could think so. But we see great reason to doubt whether this be a well-founded expectation. We see that during the last two hundred and fifty years the human mind has been in the highest degree active, that it has made great advances in every branch of natural philosophy, that it has produced innumerable inventions tending to promote the convenience of life, that medicine, surgery, chemistry, engineering, have been very greatly improved, that government, police, and law have been improved, though not to so great an extent as the physical sciences. But we see that, during these two hundred and fifty years, Protestantism has made no conquests worth speaking of. Nay, we believe that, as far as there has been a change, that change has, on the whole, been in favor of the Church of Rome. We cannot, therefore, feel confident that the progress of knowledge will necessarily be fatal to a system which has, to say the least, stood its ground in spite of the immense progress made by the human race in knowledge since the days of Queen Elizabeth. Indeed, the argument which we are considering seems to us to be founded on an entire mistake. There are branches of knowledge with respect to which the law of the human mind is progress. In mathematics, when once a proposition has been demonstrated, it is never afterwards contested. Every fresh story is as solid a basis for a new superstructure as the original foundation was. Here, therefore, there is a constant addition to the stock of truth. In the inductive sciences again, the law is progress. Every day furnishes new facts, and thus brings theory nearer and nearer to perfection. There is no chance that, either in the purely demonstrative or in the purely experimental sciences, the world will ever go back or even remain stationary. Nobody ever heard of a reaction against Taylor's theorem, or of a reaction against Harvey's doctrine of the circulation of the blood.