comprehending his plans in the universe, and at the same time has condescended to reveal to him directly his will on certain points, there is nothing unphilosophical or improbable in the supposition that the same truths may be struck out on the one hand by the action of the human mind on nature, and on the other by the action of the Divine mind on that of man. The highest and most nobly constituted minds have ever been striving to scale heaven above and dive into the earth below, that they may extort from them the secret of their origin, and may find what are the privileges and destinies of man himself. They have learned much; and if through other gifted minds, and through his heaven-descended Word and Spirit, God has condescended to reveal himself, there must surely be much in common in that which God's works teach to earnest inquirers and that which he directly makes known. But few of our greatest thinkers, whether on nature or theology, have reached the firm ground of this higher probability; or if they have reached it, have dreaded the scorn of the half-learned too much to utter their convictions. Still this is a position which the enlightened Christian and student of nature must be prepared to occupy, humbly and with admission of much ignorance and incapacity, but with bold assertion of the truth that there are meeting-points of nature and revelation which afford legitimate subjects of study. In entering on these subjects, we may receive certain great truths in reference to the history of the earth as established by geological evidence. In the present rapidly progressive state of the science, however, it is by no means easy to separate its assured and settled results from those that have been founded on too hasty generalization, or are yet immature; and at the same time to avoid overlooking new and important truths, sufficiently established, yet not known in all their dimensions. In the following summary I shall endeavor to present to the reader only well-ascertained general truths, without indulging in those deviations from accuracy for effect too often met with in popular books. On the other hand, we have already found that the Scriptures enunciate distinct doctrines on many points relating to the earth's early history, to which it will here be necessary merely to refer in general terms. Let us in the first place shortly consider the conclusions of geology as to the origin and progress of creation.