Blessed is the nation whose {h} God is the LORD; and the people whom he hath chosen for his own inheritance.

(h) He shows that all our happiness stands in this, that the Lord is our God.

Jamieson-Fausset-Brown Bible Commentary

12-19. The inference from the foregoing in Ps 33:12 is illustrated by God's special providence, underlying which is His minute knowledge of all men.

Matthew Henry's Concise Commentary

33:12-22 All the motions and operations of the souls of men, which no mortals know but themselves, God knows better than they do. Their hearts, as well as their times, are all in his hand; he formed the spirit of each man within him. All the powers of the creature depend upon him, and are of no account, of no avail at all, without him. If we make God's favour sure towards us, then we need not fear whatever is against us. We are to give to him the glory of his special grace. All human devices for the salvation of our souls are vain; but the Lord's watchful eye is over those whose conscientious fear of his name proceeds from a believing hope in his mercy. In difficulties they shall be helped; in dangers they shall not receive any real damage. Those that fear God and his wrath, must hope in God and his mercy; for there is no flying from him, but by flying to him. Let thy mercy, O Lord, be upon us; let us always have the comfort and benefit, not according to our merits, but according to the promise which thou hast in thy word given to us, and according to the faith thou hast by thy Spirit and grace wrought in us.