Verse 8. - I delight to do thy will, O my God: yea, thy Law is within my heart. The obedience to be rendered will be a true and acceptable obedience,

(1) cheerful, and

(2) from the heart.

Consciously or unconsciously, David speaks as the type of Christ (see Hebrews 10:5-7).

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.I delight to do thy will, O my God,.... This he came down from heaven to do, and this he did do, by preaching the Gospel, and working miracles; and above all by obtaining eternal redemption for his people, which he effected by fulfilling the law, becoming a sacrifice, and suffering and dying in their room; all which were the will of God, and grateful to him, and in doing which Christ took the utmost delight and pleasure, John 4:34;

yea, thy law is within my heart; either the whole moral law, under which he was, as man, and the surety of his people; and which was written upon his heart, and which he perfectly obeyed; or that particular law, injunction, and command laid upon him by his Father, to offer himself a sacrifice, and lay down his life for men; which he agreed to, had it in his mind, his heart was set upon it, and he cheerfully complied with it, John 10:18.