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22. I will declare thy name. ⁵²⁰⁵²⁰     The second part of the psalm here commences. There is a transition from language of the deepest anguish to that of exalted joy and gratitude. The suffering Messiah here contemplates the blessed results of his sufferings. David, in promising that when he is delivered he will not be ungrateful, confirms what I have previously stated, that he had never been so cast down by temptation as not to take courage to resist it. How could he be putting himself in readiness, as he is doing here, to offer to God the sacrifice of thanksgiving, if he had not beforehand entertained the assured hope of deliverance? Should we even grant that this psalm was composed after David had actually obtained what he desired, there is no doubt that what he afterwards put into writing formed the meditations and reflections which had passed through his mind during the time of his heavy afflictions. It ought to be particularly noticed, that it is no ordinary token of gratitude which he promises, but such as God required for rare blessings; namely, that the faithful should come into his sanctuary, and there bear solemn testimony to the grace which they had received. The design of public and solemn thanksgiving is, that the faithful may employ themselves in all variety of ways, in serving and honoring God, and that they may encourage one another to act in the same manner. We know that God’s wonderful power shone forth in the protection of David; and that not only by one miracle, but by many. It is, therefore, not wonderful that he brings himself under obligation, by a solemn vow, to make open and public profession of his piety and faithfulness towards God. By his brethren he means the Israelites; and he gives them this appellation, not only because he and they were both descended from the same parentage, but rather because the religion which they had in common, as a sacred bond, kept them united to one another by a spiritual relationship. The apostle, (Hebrews 2:12) in applying this verse to Christ, argues from it, that he was a partaker of the same nature with us, and joined to us by a true fellowship of the flesh, seeing he acknowledges us as his brethren, and vouchsafes to give us a title so honorable. I have already repeatedly stated, (and it is also easy to prove it from the end of this psalms) that under the figure of David, Christ has been here shadowed forth to us. The apostle, therefore, justly deduces from this, that under and by the name of brethren, the right of fraternal alliance with Christ has been confirmed to us. This, no doubt, to a certain extent belongs to all mankind, but the true enjoyment thereof belongs properly to genuine believers alone. For this reason Christ himself, with his own mouth, limits this title to his disciples, saying,

“Go to my brethren, and say unto them, I ascend unto my Father and your Father, and to my God and your God,”
(John 20:17.)

The ungodly, by means of their unbelief, break off and dissolve that relationship of the flesh, by which he has allied himself to us, and thus render themselves utter strangers to him by their own fault. As David, while he comprehended under the word brethren all the offspring of Abraham, immediately after (verse 23) particularly addresses his discourse to the true worshippers of God; so Christ, while he has broken down “the middle wall of partition” between Jews and Gentiles, and published the blessings of adoption to all nations, and thereby exhibited himself to them as a brother, retains in the degree of brethren none but true believers.