The following is taken from William Romaine’s An Essay on Psalmody:
This is the subject of the book of Psalms. It treats of Christ, and contains the praises of the Father’s love, and of the Spirit’s grace, as they were manifested in the person and work of Jesus Christ. The salvation of sinners through him is the greatest display of the covenant mercies of the eternal Three: therefore the Psalms celebrate his wonderful person, and his divine undertakings—they describe his obedience and sufferings—his conflicts with, and victories over, all his enemies—his resurrection and ascension—his sitting upon the throne, the great king of all worlds, visible and invisible—his gathering together, and perfecting the number of his elect—his coming at the last day to judge men and angels—and the glory which he will bestow upon his redeemed, when they shall be with him, and like him, kings and priests unto God and his Father, and shall reign with him for ever.
