To construct a complete Criticism of any Revelation, it is necessary that the Critic should be in possession of a perfect Philosophy of the Infinite. For, except on the supposition that we possess an exact knowledge of the whole Nature of God, such as only that Philosophy can furnish, we cannot know for certain what are the purposes which God intends to accomplish by means of Revelation, and what are the instruments by which those purposes may be best carried out. If then it can be shewn, as I have attempted to shew in the previous Lectures, that the attainment of a Philosophy of the Infinite is utterly impossible under the existing laws of human thought, it follows that it is not by means of philosophical criticism that the claims of a supposed Revelation can be adequately tested. We are thus compelled to seek another field for the right use of Reason in religious questions; and what that field is, it will not be difficult to determine. To Reason, rightly employed, within its proper limits and on its proper objects, our Lord Himself and His Apostles openly appealed in proof of their divine mission; and the same proof has been unhesitatingly claimed by the defenders of Christianity in all subsequent ages.