Charles H. Spurgeon on Psalms 117:1

O praise the LORD, all ye nations. This is an exhortation to the Gentiles to glorify Jehovah, and a clear proof that the Old Testament spirit differed widely from that narrow and contracted national bigotry with which the Jews of our Lord's day became so inveterately diseased. The nations could not be expected to join in the praise of Jehovah unless they were also to be partakers of the benefits which Israel enjoyed; and hence the Psalm was an intimation to Israel that the grace and mercy of their God were not to be confined to one nation, but would in happier days be extended to all the race of man, even as Moses had prophesied when he said, "Rejoice. O ye nations, his people" (De 32:43), for so the Hebrew has it. The nations were to be his people. He would call them a people that were not a people, and her beloved that was not beloved. We know and believe that no one tribe of men shall be unrepresented in the universal song which shall ascend unto the Lord of all. Individuals have already been gathered out of every kindred and people and tongue by the preaching of the gospel, and these have right heartily joined in magnifying the grace which sought them out, and brought them to know the Saviour. These are but the advance guard of a number which no man can number who will come ere long to worship the all glorious One. Praise him, all ye people. Having done it once, do it again, and do it still more fervently, daily increasing in the reverence and zeal with which you extol the Most High. Not only praise him nationally by your rulers, but popularly in your masses. The multitude of the common folk shall bless the Lord. Inasmuch as the matter is spoken of twice, its certainty is confirmed, and the Gentiles must and shall extol Jehovah —all of them, without exception. Under the gospel dispensation we worship no new god, but the God of Abraham is our God for ever and ever; the God of the whole earth shall he be called.