Verse 22. - Let thy mercy, O Lord, be upon us, according as we hope in thee. The measure of men's hope and trust in God is the measure of his mercy and goodness to them. Those who are assured that they have a full trust in him may confidently expect a fall and complete deliverance. Thus, "according as" - כַאֲשֶׁר - is emphatic.

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.Let thy mercy, O Lord, be upon us,.... That is, an application of it in its effects: it is a prayer for a communication of grace and mercy to help in a time of need; and for a discovery of pardoning grace and mercy; and it is a prayer of faith; for the mercy of the Lord is upon his people in great plenty, and it continues; and they have reason to believe it ever will, Psalm 103:17;

according as we hope in thee; not according to any merits of theirs, but according to the measure of grace, of the grace of hope which God had bestowed on them, and encouraged them to exercise on him, in expectation of finding grace and mercy with him.