Hide thy face from my sins - That is, Do not look on them; avert thy face from them; do not regard them. Compare the notes at Psalm 13:1.

And blot out all mine iniquities - Take them entirely away. Let the account be erased, cancelled, destroyed. See the notes at Psalm 51:1.

Hide thy face from my sins - The sentiment here is nearly the same as that in Psalm 51:3 : His sin was ever before his own face; and he knew that the eye of God was constantly upon him, and that his purity and justice must be highly incensed on the account. He therefore, with a just horror of his transgressions, begs God to turn away his face from them, and to blot them out, so that they may never more be seen. See the note on Psalm 51:1 (note).

Hide thy face from my sins,.... In whose sight they were committed, being now ashamed of them himself, and ashamed that any should see them, and especially his God; and being filthy and nauseous, he knew they must be abominable to him, who is of purer eyes than to behold iniquity; and being breaches of his law, must be offensive to him, and provoke the eyes of his glory; and were such that he knew would not bear the examination of justice; and that if God was strict to mark them, he could not stand before him: moreover, in this petition the psalmist deprecates a severe chastisement of them, which is sometimes expressed by setting sins before him, Psalm 90:8; and entreats the pardon of them, or oblivion and non-remembrance of them, that they might be cast behind his back, and into the depths of the sea;

and blot out all mine iniquities; as in Psalm 51:1; here repeated, to show his deep sense of them, and his great importunity for the forgiveness of them; and adds the word all, including all his other sins, with those he had lately committed; for he knew that, if anyone, was left unpardoned, he could never answer for it.

Hide thy face from my sins, and blot out all mine iniquities.

9. Hide, &c.-Turn from beholding.

51:7-15 Purge me with hyssop, with the blood of Christ applied to my soul by a lively faith, as the water of purification was sprinkled with a bunch of hyssop. The blood of Christ is called the blood of sprinkling, Heb 12:24. If this blood of Christ, which cleanses from all sin, cleanse us from our sin, then we shall be clean indeed, Heb 10:2. He asks not to be comforted, till he is first cleansed; if sin, the bitter root of sorrow, be taken away, he can pray in faith, Let me have a well-grounded peace, of thy creating, so that the bones broken by convictions may rejoice, may be comforted. Hide thy face from my sins; blot out all mine iniquities out of thy book; blot them out, as a cloud is blotted out and dispelled by the beams of the sun. And the believer desires renewal to holiness as much as the joy of salvation. David now saw, more than ever, what an unclean heart he had, and sadly laments it; but he sees it is not in his own power to amend it, and therefore begs God would create in him a clean heart. When the sinner feels this change is necessary, and reads the promise of God to that purpose, he begins to ask it. He knew he had by his sin grieved the Holy Spirit, and provoked him to withdraw. This he dreads more than anything. He prays that Divine comforts may be restored to him. When we give ourselves cause to doubt our interest in salvation, how can we expect the joy of it? This had made him weak; he prays, I am ready to fall, either into sin or into despair, therefore uphold me with thy Spirit. Thy Spirit is a free Spirit, a free Agent himself, working freely. And the more cheerful we are in our duty, the more constant we shall be to it. What is this but the liberty wherewith Christ makes his people free, which is contrasted with the yoke of bondage? Ga 5:1. It is the Spirit of adoption spoken to the heart. Those to whom God is the God of salvation, he will deliver from guilt; for the salvation he is the God of, is salvation from sin. We may therefore plead with him, Lord, thou art the God of my salvation, therefore deliver me from the dominion of sin. And when the lips are opened, what should they speak but the praises of God for his forgiving mercy?