The LORD sustains the humble, but casts the wicked to the ground.
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
The Lord lifteth up the meek: he casteth the wicked down to the ground. He reverses the evil order of things. The meek are down, and he lifts them up; the wicked are exalted, anti he hurls them down to the dust.
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