Joseph Benson's Commentary of the Old and New Testaments - Psalms 40:7
Psalms 40:7. 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... read more
Albert Barnes' Notes on the Whole Bible - Psalms 40:7
Then said I - In Hebrews 10:7, the apostle applies this to the Messiah. See the notes at that verse. This is the most simple and satisfactory interpretation of the passage. The word “then” in this verse means, “since this is the case;” or, “things being thus.” It does not refer to time, but to the condition of things. “Since it was certain that the work needful to be done could not be accomplished by bloody offerings - the sacrifice of animals - under these circumstances I said;” that is, I... read more