This is Lord Bacon’s justification, and an intelligible one, for considering that the fall of atheistic philosophy in ancient times was a blight upon the hopes of physical science. “Aristotle,” he says, “Galen, and others frequently introduce such causes as these:—the hairs of the eyelids are for a fence to the sight; the bones for pillars whence to build the bodies of animals; the leaves of trees are to defend the fruit from the sun and wind; the clouds are designed for watering the earth. All which are properly alleged in metaphysics; but in physics, are impertinent, and as _remoras_ to the ship, that hinder the sciences from holding on their course of improvement, and as introducing a neglect of searching after physical causes.”(27) Here then is one reason for the prejudice of physical philosophers against Theology:—on the one hand, their deep satisfaction in the laws of nature indisposes them towards the thought of a Moral Governor, and makes them sceptical of His interposition; on the other hand, the occasional interference of religious criticism in a province not religious, has made them sore, suspicious, and resentful. 4. Another reason of a kindred nature is to be found in the difference of method by which truths are gained in theology and in physical science. Induction is the instrument of Physics, and deduction only is the instrument of Theology. There the simple question is, What is revealed? all doctrinal knowledge flows from one fountain head. If we are able to enlarge our view and multiply our propositions, it must be merely by the comparison and adjustment of the original truths; if we would solve new questions, it must be by consulting old answers. The notion of doctrinal knowledge absolutely novel, and of simple addition from without, is intolerable to Catholic ears, and never was entertained by any one who was even approaching to an understanding of our creed. Revelation is all in all in doctrine; the Apostles its sole depository, the inferential method its sole instrument, and ecclesiastical authority its sole sanction. The Divine Voice has spoken once for all, and the only question is about its meaning. Now this process, as far as it was reasoning, was the very mode of reasoning which, as regards physical knowledge, the school of Bacon has superseded by the inductive method:—no wonder, then, that that school should be irritated and indignant to find that a subject-matter remains still, in which their favourite instrument has no office; no wonder that they rise up against this memorial of an antiquated system, as an eyesore and an insult; and no wonder that the very force and dazzling success of their own method in its own departments should sway or bias unduly the religious sentiments of any persons who come under its influence. They assert that no new truth can be gained by deduction; Catholics assent, but add that, as regards religious truth, they have not to seek at all, for they have it already.