Psalms 51:13

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?

Then will I teach transgressors thy ways. It was his fixed resolve to be a teacher of others; and assuredly none instruct others so well as those who have been experimentally taught of God themselves. Reclaimed poachers make the best gamekeepers. Huntingdon's degree of S.S., or Sinner Saved, is more needful for a soul winning evangelist than either M.A. or D.D. The pardoned sinner's matter will be good, for he has been taught in the school of experience, and his manner will be telling, for he will speak sympathetically, as one who has felt what he declares. The audience the psalmist would choose is memorable —he would instruct transgressors like himself; others might despise them, but, "a fellow feeling makes us wondrous kind." If unworthy to edify saints, he would creep in along with the sinners, and humbly tell them of divine love. The mercy of God to one is an illustration of his usual procedure, so that our own case helps us to understand his "ways, "or his general modes of action: perhaps, too, David under that term refers to the preceptive part of the word of God, which, having broken, and having suffered thereby, he felt that he could vindicate and urge upon the reverence of other offenders. And sinners shall be converted unto thee. My fall shall be the restoration of others. Thou wilt bless my pathetic testimony to the recovery of many who, like myself, have turned aside unto crooked ways. Doubtless this Psalm and the whole story of David, have produced for many ages the most salutary results in the conversion of transgressors, and so evil has been overruled for good.