Great is our Lord, and mighty in power; His understanding has no limit.
God stirs us to praise Him for two reasons: His power and wisdom shown in governing all creation, and His special mercy to His chosen Church, restoring it when it falls, gathering it when scattered. The Psalm likely arose after Jerusalem's rebuilding, when the people saw God's hand return them from captivity.
AI summary
Commenting on Psalm 147:1-20
Great is our Lord. Our Lord and King is great—magnanimous, infinite, inconceivably glorious. None can describe his majesty, or reckon up the number of his excellencies. And of great power. Doing as he wills, and willing to do mighty deeds. His acts reveal something of his might, but the mass of his power is hidden, for all things are possible with God, even the things impossible with men.
Here, I. The duty of praise is recommended to us. It is not without reason that we are thus called to it again and again: Praise you the Lord (Psa 147:1), and again (Psa 147:7), Sing unto the Lord with thanksgiving, sing praise upon the harp to our God (let all our praises be directed to him and centre in him), for it is good...
Commenting on Psalm 147:1-11