There are three great subjects on which Human Reason employs itself:—God, Nature, and Man: and theology being put aside in the present argument, the physical and social worlds remain. These, when respectively subjected to Human Reason, form two books: the book of nature is called Science, the book of man is called Literature. Literature and Science, thus considered, nearly constitute the subject-matter of Liberal Education; and, while Science is made to subserve the former of the two injuries, which Revealed Truth sustains,—its exclusion, Literature subserves the latter,—its corruption. Let us consider the influence of each upon Religion separately. 3. I. As to Physical Science, of course there can be no real collision between it and Catholicism. Nature and Grace, Reason and Revelation, come from the same Divine Author, whose works cannot contradict each other. Nevertheless, it cannot be denied that, in matter of fact, there always has been a sort of jealousy and hostility between Religion and physical philosophers. The name of Galileo reminds us of it at once. Not content with investigating and reasoning in his own province, it is said, he went out of his way directly to insult the received interpretation of Scripture; theologians repelled an attack which was wanton and arrogant; and Science, affronted in her minister, has taken its full revenge upon Theology since. A vast multitude of its teachers, I fear it must be said, have been either unbelievers or sceptics, or at least have denied to Christianity any teaching, distinctive or special, over the Religion of Nature. There have indeed been most illustrious exceptions; some men protected by their greatness of mind, some by their religious profession, some by the fear of public opinion; but I suppose the run of experimentalists, external to the Catholic Church, have more or less inherited the positive or negative unbelief of Laplace, Buffon, Franklin, Priestley, Cuvier, and Humboldt. I do not of course mean to say that there need be in every case a resentful and virulent opposition made to Religion on the part of scientific men; but their emphatic silence or phlegmatic inadvertence as to its claims have implied, more eloquently than any words, that in their opinion it had no voice at all in the subject-matter, which they had appropriated to themselves. The same antagonism shows itself in the middle ages. Friar Bacon was popularly regarded with suspicion as a dealer in unlawful arts; Pope Sylvester the Second has been accused of magic for his knowledge of natural secrets; and the geographical ideas of St. Virgil, Bishop of Saltzburg, were regarded with anxiety by the great St. Boniface, the glory of England, the Martyr-Apostle of Germany. I suppose, in matter of fact, magical superstition and physical knowledge did commonly go together in those ages: however, the hostility between experimental science and theology is far older than Christianity. Lord Bacon traces it to an era prior to