Verse 10. - I have not hid thy righteousness within my heart; I have declared thy faithfulness and thy salvation; I have not concealed thy loving-kindness and thy truth from the great congregation. David's psalms furnish a running commentary on these statements. Composed, as appears from the titles, mainly for use in the "great congregation," they set forth the righteousness, faithfulness, salvation, loving-kindness, and truth of God in the strongest possible way. Contemporary Israel, and later Israel, and the Church which has succeeded to the place of the original Israelites, and become "the Israel of God," are alike indebted to him for the wonderful strains in which he has shown forth and magnified these qualities of the Almighty.

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 have not not hid thy righteousness within my heart,.... Meaning not the essential righteousness of God, though that was abundantly declared in the wounds, sufferings, and death of Christ; and which was the end indeed of his being a propitiation for sin, Romans 3:25; but his own righteousness, as before, which he wrought out, and brought in; and which is called the righteousness of God his Father, because it is approved of by him, and accepted with him, and which he imputes to all his people;

I have declared thy faithfulness and thy salvation: trial is, the "faithfulness" of God in executing all his purposes, counsels, and decrees, which are said to be faithfulness and truth; and in fulfilling his covenant and promises, relating to the redemption and salvation of men by Christ; and in the mission of Christ into this world on that account; and in the accomplishment of all the prophecies of the Old Testament concerning him; and in making good all the particular promises of support, help, and strength, made to the Messiah himself: and by his "salvation" is meant, that which is of God the Father's appointing, continuing, and settling, in the council and covenant of grace; which he sent his Son to be the author of, and which he has obtained; and is the great doctrine of the Gospel preached by himself, and his faithful ministers, Luke 19:9;

I have not concealed thy lovingkindness and thy truth from the great congregation; or "in the great congregation", as the Targum. By the "lovingkindness" of God is designed both his love to Christ, which was before the foundation of the world, and continued in his lowest state of humiliation, and which our Lord was far from concealing, but gave openly instances of it, John 17:24; and this love to his people; and which he declared to be the same with that which he is loved with, and instances in the gift of himself to them by his Father, as the great evidence of it, John 17:23; and by "truth" is intended the Gospel in general, which came by Christ, was preached by him, which he bore witness to, to do which was one end of his coming into the world; and this was not concealed by him, who is truth itself; but was fully and plainly declared by him, as it had not been before, John 1:17.