1. Praise God in his sanctuary. This psalm in general commends the spiritual worship of God, which consists in sacrifices of praise. By the sanctuary there is little doubt that heaven is here meant, as is often the case elsewhere. The second clause is exegetical, for the same thing is repeated. But for sanctuary we read רקיע, rekia, that is, the expanse of heaven, to which is added the epithet of power, because there we have a proof of the matchless power of God, so that we cannot look to the heavens without being lost in admiration. As to the interpretation which some give — Praise God, ye angels who inhabit the heavens, and ye men who dwell under the firmament, it is forced and unnatural; for the Psalmist, in order to awaken men who grow languid in God’s praises, bids them lift their eyes towards the heavenly sanctuary. That the majesty of God may be duly reverenced, the Psalmist represents him as presiding on his throne in the heavens; and he enlarges upon the same truth in the second verse, celebrating his power and his greatness, which he had brought under our notice in the heavens, which are a mirror in which they may be seen. If we would have our minds kindled, then, to engage in this religious service, let us meditate upon his power and greatness, which will speedily dispel all such insensibility. Though our minds can never take in this immensity, the mere taste of it will deeply affect us. And God will not reject such praises as we offer according to our capacity.