This is a thanksgiving-psalm, and it is of such a general use and application that we need not suppose it penned upon any particular occasion. All people are here called upon to praise God, I. For the general instances of his sovereign dominion and power in the whole creation (Psa 66:1-7). II. For the special tokens of his favour to the church, his peculiar people (Psa 66:8-12). And then, III. The psalmist praises God for his own experiences of his goodness to him in particular, especially in answering his prayers (Psa 66:13-20). If we have learned in every thing to give thanks for ancient and modern mercies, public and personal mercies, we shall know how to sing this psalm with grace and understanding. To the chief musician. A song or psalm.