It has been customary among a certain school of writers to speak of the Scriptures, because ‘inspired,’ as a Divine-human book, and to appeal to the analogy of Our Lord’s Divine-human personality to explain their peculiar qualities as such. The expression calls attention to an important fact, and the analogy holds good at a certain distance. There are human and divine sides to Scripture, and, as we cursorily examine it, we may perceive in it, alternately, traits which suggest now the one, now the other factor in its origin. But the analogy with Our Lord’s Divine-human personality may easily be pressed beyond reason. There is no hypostatic union between the Divine and the human in Scripture; we cannot parallel the ‘inscripturation’ of the Holy Spirit and the incarnation of the Son of God. The Scriptures are merely the product of Divine and human forces working together to produce a product in the production of which the human forces work under the initiation and prevalent direction of the Divine: the person of Our Lord unites in itself Divine and human natures, each of which retains its distinctness while operating only in relation to the other. Between such diverse things there can exist only a remote analogy; and, in point of fact, the analogy in the present instance amounts to no more than that in both cases Divine and human factors are involved, though very differently. In the one they unite to constitute a Divine-human person, in the other they coöperate to perform a Divine-human work. Even so distant an analogy may enable us, however, to recognize that as, in the case of Our Lord’s person, the human nature remains truly human while yet it can never fall into sin or error because it can never act out of relation with the Divine nature into conjunction with which it has been brought; so in the case of the production of Scripture by the conjoint action of human and Divine factors, the human factors have acted as human factors, and have left their mark on the product as such, and yet cannot have fallen into that error which we say it is human to fall into, because they have not acted apart from the Divine factors, by themselves, but only under their unerring guidance.
B. B. Warfield, "The Biblical Idea of Inspiration," in Works (OUP, 1932; reprinted, Baker, 2003), 108f.