Psalms 51:8

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, He 12:24. If this blood of Christ, which cleanses from all sin, cleanse us from our sin, then we shall be clean indeed, He 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?

Make me to hear joy and gladness. He prays about his sorrow late in the Psalm; he began at once with his sin; he asks to hear pardon, and then to hear joy. He seeks comfort at the right time and from the right source. His ear has become heavy with sinning, and so he prays, "Make me to hear." No voice could revive his dead joys but that which quickeneth the dead. Pardon from God would give him double joy —"joy and gladness." No stinted bliss awaits the forgiven one; he shall not only have a double blooming joy, but he shall hear it; it shall sing with exultation. Some joy is felt but not heard, for it contends with fears; but the joy of pardon has a voice louder than the voice of sin. God's voice speaking peace is the sweetest music an ear can hear. That the bones which thou hast broken may rejoice. He was like a poor wretch whose bones are crushed, crushed by no ordinary means, but by omnipotence itself. He groaned under no mere flesh wounds; his firmest and yet most tender powers were "broken in pieces all asunder; "his manhood had become a dislocated, mangled, quivering sensibility. Yet if he who crushed would cure, every wound would become a new mouth for song, every bone quivering before with agony would become equally sensible of intense delight. The figure is bold, and so is the supplicant. He is requesting a great thing; he seeks joy for a sinful heart, music for crushed bones. Preposterous prayer anywhere but at the throne of God! Preposterous there most of all but for the cross where Jehovah Jesus bore our sins in his own body on the tree. A penitent need not ask to be an hired servant, or settle down in despairing content with perpetual mourning; he may ask for gladness and he shall have it; for if when prodigals return the father is glad, and the neighbours and friends rejoice and are merry with music and dancing, what need can there be that the restored one himself should be wretched?