(7) Then said I.--This rendering, which follows the LXX. and Vulg., and is adopted in the Epistle to the Hebrews, must be abandoned. The Hebrew means, Lo! I come, bringing the book written for me, which no doubt refers to the Law, which in the person of the poet, Israel here produces as warrant for its conduct. Some see a particular allusion to the discovery of the Book of Deuteronomy in Josiah's reign. But if the conjecture of Gratz be accepted (see preceding Note), the reference will be rather to the Levitical regulation of sacrifice. "Shouldest thou require burnt-offering and sin-offering, then I say, Lo! I bring the book in which all is prescribed me," i.e., I have duly performed all the rites ordained in the book.

The rendering "written on me," i.e., "on my heart and mind," might suit the contents of the book, but not the roll itself.

Verse 7. - Then said I, Lo, I come: in the volume of the book it is written of me; rather, then said I, Lo, I come with the roll of the book written concerning me. "Then" means "as soon as my ears were opened." "Lo, I come," marks ready and prompt obedience (see Numbers 22:38; 2 Samuel 19:20). The psalmist represents himself as brining with him "the roll of the book," i.e. the book of the Law in its ordinary form of a parchment roll, to show what it is that he is prepared to obey. This book, he says, is written "concerning him," since it contains precepts concerning a king's duties (Deuteronomy 17:14-20).

40:6-10 The psalmist foretells that work of wonder, redemption by our Lord Jesus Christ. The Substance must come, which is Christ, who must bring that glory to God, and that grace to man, which it was impossible the sacrifices should ever do. Observe the setting apart of our Lord Jesus to the work and office of Mediator. In the volume, or roll, of the book it was written of him. In the close rolls of the Divine decrees and counsel, the covenant of redemption was recorded. Also, in all the volumes of the Old Testament something was written of him, Joh 19:28. Now the purchase of our salvation is made, the proclamation is sent forth, calling us to come and accept it. It was preached freely and openly. Whoever undertook to preach the gospel of Christ, would be under great temptation to conceal it; but Christ, and those he calls to that work, are carried on in it. May we believe his testimony, trust his promise, and submit to his authority.Then said I,.... As in the council and covenant of peace, when and where he declared his willingness to come into the world, and make satisfaction for the sins of his people; so when the fulness of time was come for his appearance in human nature he repeated the same; for of the time of his coming into the world are these words interpreted, Hebrews 10:5; when sacrifice and offering God would not have any longer continued, and when a body was prepared him, then he said,

Lo, I come; O Father; as Apollinarius, in his metaphrase, adds; that is, freely, and without compulsion; immediately, at once, without any delay; and he himself, and not another; and this not by change of place, but by assumption of nature; taking the body, or human nature, prepared for him, and uniting it to himself; to which the word "lo" is prefixed as a note of attention and admiration; the incarnation of Christ being a wonderful affair, and of the utmost moment and importance;

in the volume of the book it is written of me; either in the book of divine predestination, in the purposes and decrees of God, Psalm 139:16; or in the book of the Scriptures; either in general, John 5:39, Luke 24:27; or particularly in the book of the Psalms, Psalm 1:1; or rather in the book of the law, the five books of Moses, since these were the only books or volumes that were composed at the writing of this psalm; and it has respect not to Deuteronomy 18:15; nor Deuteronomy 17:18; nor Exodus 21:6; but rather Genesis 3:15; and seeing the coming of Christ into the world was not only appointed of God, agreed unto by Christ, but was prophesied of, and penned down in the sacred writings; therefore at the appointed time he came, freely and willingly. This book is called a volume, or roll, alluding to the manner of writing formerly; when what was written was finished, it was rolled about a stick in the manner of a cylinder; and in this form is the book of the law with the Jews to this day; See Gill on Luke 4:17.