Psalms 40:7 - Joseph Benson’s Commentary on the Old and New Testaments

Then When I understood and considered thy mind and will therein expressed, Psalms 40:6, I said within myself, by a firm purpose; or unto thee, by way of promise, or engagement, Lo, I come If these be considered as the words of a servant, answering to the call of his master, and signifying his readiness to obey him, they may be accommodated to David. But they much more literally and truly belong to Christ, and the sense is, Seeing thou requirest a better sacrifice than those of the law, lo, I offer myself to come, and I will in due time come into the world, as this phrase is explained in divers places of Scripture, and particularly Hebrews 10:5, where this place is expressly applied to Christ. In the volume of the book These two words, volume and book, are used of any writing, and both express the same thing. Now this volume of the book is the law of Moses, which is commonly and emphatically called the book, and was made up in the form of a roll or volume, as the Hebrew books generally were. And so this place manifestly points to Christ, concerning whom much is said in the books of Moses, as is evident from Luke 24:27; Luke 24:44; John 5:46; Acts 3:22; and Acts 26:22; and Acts 28:23. And this sense being plain and natural, and unforced, and exactly agreeing both with the words, and with the truth of the thing, and with the belief of all Christians, there can be no good reason why we should not acquiesce in it.