Be thou exalted, LORD, in thine own strength: so will we sing and praise thy power. Be thou exalted - Exalt thyself. O Lord - thy creatures cannot exalt thee. Lift thyself up, and discomfit thy foes by thine own strength! Thou canst give a victory to thy people over the most formidable enemies, though they strike not one blow in their own defense. God's right hand has often given the victory to his followers, while they stood still to see the salvation of God. How little can the strength of man avail when the Lord raiseth up himself to the battle! His children, therefore, may safely trust in him, for the name of the Lord is a strong tower; the righteous flee into it, and are safe.
Praise thy power - God is to receive praise in reference to that attribute which he has exhibited most in the defense or salvation of his followers. Sometimes he manifests his power, his mercy, his wisdom, his longsuffering, his fatherly care, his good providence, his holiness, his justice, his truth, etc. Whatever attribute or perfection he exhibits most, that should be the chief subject of his children's praise. One wants teaching, prays for it, and is deeply instructed: he will naturally celebrate the wisdom of God. Another feels himself beset with the most powerful adversaries, with the weakest of whom he is not able to cope: he cries to the Almighty God for strength; he is heard, and strengthened with strength in his soul. He therefore will naturally magnify the all-conquering power of the Lord. Another feels himself lost, condemned, on the brink of hell; he calls for mercy, is heard and saved: mercy, therefore, will be the chief subject of his praise, and the burden of his song.
The old Anglo-Scottish Psalter says, We sal make knowen thi wordes in gude wil and gude werk, for he synges well that wirkes well. For thi, sais he twise, we sal syng; ane tyme for the luf of hert; another, for the schewyng of ryghtwisness, til ensampil.
Commentary on the Bible, by Adam Clarke [1831].