And its fallacy was soon and thoroughly exposed. The advent of modified uniformitarian principles all but banished the word catastrophe from science, and marked the birth of Geology as we know it now. Geology, that is to say, had fallen at last into the great scheme of Law. Religious doctrines, many of them at least, have been up to this time all but as _catastrophic_ as the old Geology. They are not on the lines of Nature as we have learned to decipher her. If any one feel, as Science complains that it feels, that the lie of things in the Spiritual World as arranged by Theology is not in harmony with the world around, is not, in short, scientific, he is entitled to raise the question whether this be really the final form of those departments of Theology to which his complaint refers. He is justified, moreover, in demanding a new investigation with all modern methods and resources; and Science is bound by its principles not less than by the lessons of its own past, to suspend judgment till the last attempt is made. The success of such an attempt will be looked forward to with hopefulness or fearfulness just in proportion to one's confidence in Nature--in proportion to one's belief in the divinity of man and in the divinity of things. If there is any truth in the unity of Nature, in that supreme principle of Continuity which is growing in splendor with every discovery of science, the conclusion is foregone. If there is any foundation for Theology, if the phenomena of the Spiritual World are real, in the nature of things they ought to come into the sphere of Law. Such is at once the demand of Science upon Religion and the prophecy that it can and shall be fulfilled. The Botany of Linnæus, a purely artificial system, was a splendid contribution to human knowledge, and did more in its day to enlarge the view of the vegetable kingdom than all that had gone before. But all artificial systems must pass away. None knew better than the great Swedish naturalist himself that his system, being artificial, was but provisional. Nature must be read in its own light. And as the botanical field became more luminous, the system of Jussieu and De Candolle slowly emerged as a native growth, unfolded itself as naturally as the petals of one of its own flowers, and forcing itself upon men's intelligence as the very voice of Nature, banished the Linnæan system forever. It were unjust to say that the present Theology is as artificial as the system of Linnæus; in many particulars it wants but a fresh expression to make it in the most modern sense scientific. But if it has a basis in the constitution and course of Nature, that basis has never been adequately shown. It has depended on Authority rather than on Law; and a new basis must be sought and found if it is to be presented to those with whom Law alone is Authority.