Psalms 98:2

The Lord hath made known his salvation,.... Which was appointed him, he undertook, came to perform, and has effected; this, though wrought out, is unknown to men, especially to the Gentile world, who had no prophecy, promise, or revelation of the Messiah, and salvation by him; but now this is made known in the everlasting Gospel, called therefore the Gospel of salvation, and by the ministers of it; and, besides this, the spirit of wisdom and revelation in the knowledge of Christ, and his salvation, is given to some; whereby they come to know their need of it, the suitableness of it to their case, the necessity of going to Christ for it, and their special and particular interest in it; and such have a new song put into their mouths, and are under great obligation to sing it:

his righteousness hath he openly showed in the sight of the Heathen; either the faithfulness of God in fulfilling his promises, particularly in raising up the Saviour Jesus; or the goodness of God to his people, and the strictness of his justice on their surety; goodness towards them, and severity on him, when he spared them and not him, turned his hand of grace and mercy on them, when he awoke the sword of justice against him; or rather his own righteousness, by which he fulfilled the law in the room and stead of his people; and which being brought in is revealed in the gospel, from faith to faith; and that "openly", not in dark shadows, types, and figures; but it is to be seen with open face in the clear glass of the Gospel; and is held up and forth in the ministration of it unto the Gentiles, whom God justifies through faith in it, as well as the believing Jews; see Romans 3:30.