internal and higher science of experience, then the idea of revelation furnishes at once the key to explain, while it establishes the possibility of a knowledge of the divine. And this remark admits, also, of application to nature itself, when we consider it in its totality and internal constitution, and speak of a knowledge of these things--of the vital force which rules in it, or its animating soul; for this, indeed, eludes our grasp, but yet speaks plainly to us--to him, at least, who is wise to understand nature’s language. For if, in attempting to understand nature, we isolate her, as it were, and exclude all reference to Him who gave her being, and has assigned, also, her limits and her end--if, in short, we disturb the two poles of a right understanding of nature, then, most assuredly, will the effort be fruitless, and all our labor unprofitable. Man, however, has gone still further, and by transferring the innate discord of his internal consciousness to outward objects, has forcibly rent asunder God and Nature--he has thus divorced the sensible world and its Maker, and set them in hostile array against each other, and thereby brought physical science in collision with the knowledge of divine things and with revelation. Our fourth Lecture, therefore, was consecrated to an attempt to effect here, also, a reconciliation, or, at least, to lay the first stone, and to mark out the road by which alone we could hope to arrive at so desirable a result: and this is a problem which is even the more important the truer it is, that this discord is not confined to science and the scientific domain, but extends, also, to real life, where these discrepant views and modes of thinking are arrayed against each other in so many hostile and conflicting parties. And although, as differing merely as to the form and direction of thought, they do not come forward in so distinct a shape, or under such characteristic names, as the parties in religion and politics, still this dissension is not, therefore, less real and universal, or its effects and influence less noticeable. Of these parties the first, and by far the most numerous, is the sect of the rationalists, who doubt indiscriminately of all things, and test every matter by the standard of their own skepticism. The second class is formed of the exclusive worshipers of nature, and has many members among scientific men; while, lastly, the third consists of those who derive, from the positive source of a divine decision, the law of their thinking and the standard of their judgment. Now, this last party, if it would only go a few steps farther, and draw still deeper from this source, would be able to assign its appropriate place and value to every potence and truth in the other species of thought and knowledge, and even thereby might qualify itself to dissolve and reconcile the all-pervading discord. But inasmuch as they do not adopt this conciliatory attitude