Alleluia. Though there are only two verses, the full glory of a heading is assigned to them, so that we may realise that however few the words uttered in the Lord's praises, they are always as full as can be. None can doubt that the source of praise of heavenly splendour must not be labelled insignificant. Appropriately joined to it is the figure called in Greek hormos, 1 for it preserves the continuity of the speech to the end with no change of spokesman or theme, continuing with the one meaning from beginning to end.
Though this psalm does not allow of division because of the small number of verses, it transcends all others in the economy of its utterance. It is the prime particle of the psalms, exhibiting the distinction of the point from which the line grows and from which different types of figures are shaped in most learned diversity.
i. Praise the Lord, all ye nations, and praise him together, all ye people. We must associate this psalm too with the character of martyrs, for the holy men speak as though they have already completed their glorious suffering, saying that all nations must be roused to praise the Lord, for He bestowed on His servants such things as caused them to be inspired by His exemplary deeds. Where are the Donatists, who lyingly boast that the faith has been bestowed on their gathering alone? 2 That chorus of the saints cries out that all nations must praise the Lord; if only the Donatists even in our company would do what they lyingly claim to perform uniquely. Next comes: And praise him together, all ye people. Collective praise is that uttered in unison by all the faithful, and is seen to befit the Catholic Church assembled from different parts of the world. All nations in common are exhorted among the people so that none at the Lord's judgment may claim that they were not included.