Another Latin term for the two great divisions of the Bible was _instrumentum_, _instrument_, _document_; a term applied to the documents or body of records relating to the Roman empire, and very appropriate, therefore, to the records of God's dealings with men. But as early as the time of Tertullian, about the close of the second century, the word _testamentum_, _testament_, was more in use. See Tertullian against Marcion, 4. 1. A striking example of the superior accuracy of Jerome's independent version above his simple revision of the old Latin is the passage Jer. 31:31-33 as compared with the quotation of the same, Heb. 8:8-10. In the former, where the translation is made immediately from the Hebrew, we read: "Behold the days shall come, saith the Lord, that I will make for the house of Israel and the house of Judah a new _covenant_ (_foedus_): not according to the _covenant_ (_pactum_) which I made with their fathers," etc. In the same passage, as quoted in the epistle to the Hebrews, where we have only a revision of the old Latin, we read: "Behold the days shall come, saith the Lord, that I will accomplish for the house of Israel and for the house of Judah a new _testament_ (_testamentum_): not according to the _testament_ (_testamentum_) which I made for their fathers," etc. 3. The _unity_ of the Bible has its ground only in divine inspiration. So far as human composition is concerned, both parts of it have a great variety of authors. The writers of the Old Testament, especially, lived in different, and some of them in very distant ages. They were widely separated from each other in native character and endowments, in education, and in their outward circumstances and position in life. It is of the highest importance that the student of Scripture not only know these facts, but ponder them long and carefully, till he fully understands their deep significance. He has been accustomed from childhood to see all the books of the Bible comprised within the covers of a single volume. He can hardly divest himself of the idea that their authors, if not exactly contemporary, must yet somehow have understood each other's views and plans, and acted in mutual concert. It is only by long contemplation that he is able to apprehend the true position which these writers held to each other, separated from each other, as they often were, by centuries of time, during which great changes took place in the social and political condition of the Hebrew people. Then, for the first time, he begins to discern, in the wonderful harmony that pervades the writings of the Old Testament, taken as a whole, the clear proofs of a superintending divine Spirit; and learns to refer this harmony to its true ground, that "holy men of God spake as they were moved by the Holy Ghost." 2 Peter 1:21.