Answer me, O Jehovah! for thy mercy is good. The appeal which he here makes to the mercy and compassion of God is an evidence of the distressed condition into which he was brought. There can be no doubt that he sustained a dreadful conflict, when he had recourse to these as the only means of his safety. It is a very difficult matter to believe that God is merciful to us when he is angry with us, and that he is near us when he has withdrawn himself from us. David, aware of this, brings to his view a subject which he may oppose to this distrust, and by pleading for the exercise of the mercy and great compassions of God towards him, shows, that the only consideration which inspired him with hope was the benignant and merciful character of God. When he says, a little after, Look upon me, it is a prayer that God would make it manifest in very deed that he had heard him by granting him succor. In the following verse he utters a similar prayer. And by repeating so often the same things, he declares both the bitterness of his grief and the ardor of his desires. When he beseeches God not to hide his face, it is not from any apprehension which he entertained of being rejected, but because those who are oppressed with calamities cannot avoid being agitated and distracted with mental disquietude. But as God, in a peculiar manner, invites his servants to him, David avows that he is one of their number. In thus speaking, as I have already shown, and will afterwards have occasion to state at greater length, he does not boast of services on account of which he could prefer any claim to a divine reward, but rather depends on the gratuitous election of God; although, at the same time, he is to be understood as adducing the service which he had faithfully yielded to God by whom he was called, as an evidence of his godliness.

Hear me, O L RD, for thy lovingkindness is good - Thy mercy - thy favor - is good; that is, it is ample, abundant, great: it delights in deeds of mercy; in acts of benevolence. This was the only ground of his plea; and this was enough. Compare Psalm 63:3.
Turn unto me - Incline thine ear unto me; turn not away, but be favorable to me.
According to the multitude of thy tender mercies - See the notes at Psalm 51:1. He felt that he had occasion for the exercise of "all" the mercy of God; that the case was one which could be reached only by the exercise of the highest kindness and compassion.

Thy loving-kindness is good - The word חסד chesed signifies exuberance of kindness, and the word רחמים rachamim, which we translate tender mercies, signifies such affection as mothers bear to their young: and in God, there is רב rob, a multitude, of such tender mercies towards the children of men!

Hear me, O Lord; for thy lovingkindness is good,.... His lovingkindness to him, not only as his Son, but as Mediator; and which is a love of complacency and delight, and was from eternity, and will be to eternity: and this is "good", as appears by the effects and evidences of it; such as putting all things into his hands, showing him all that he does, concealing and keeping nothing from him, appointing him to be the Saviour of his people, the Head of the church, and the Judge of the world; and this lovingkindness shown to him is a reason why he might expect to be heard by his God and Father; see John 17:24; and the loving kindness of God to his people, and the members of Christ, is also good: it arises from the good will and pleasure of God; it is pleasantly and delightfully good to the saints, who have tasted that the Lord is gracious, and have had his love shed abroad in their hearts; it is profitably good unto them; it has prepared and laid up good things for them, both for time and eternity, even all the blessings of grace and goodness: it has promised good things unto them in covenant, and it gives Christ, and all good things along with him; it has a good influence on the graces of the Spirit, faith, hope, and love, to encourage them; and engages believers to a cheerful obedience to all the divine commands; to which may be added the duration of it, it lasts for ever: and it is so good, that it is better than any temporal good thing without it; it is better than life, and all the comforts of it, Psalm 63:3;
turn unto me, according to the multitude of thy tender mercies; his divine Father had turned away his face from him, and turned his fury upon him; he had awoke his sword of justice against him, pointed it at him, and thrust it into him; and now, satisfaction being made, he desires he would turn unto him in a way of grace and favour; that he would have respect unto him, and look upon him with his paternal countenance, and in a kind and tender manner, as well pleased with him, and with his righteousness and sacrifice. Of the phrase, "according to the multitude of that tender mercies"; see Gill on Psalm 51:1.

These earnest terms are often used, and the address to God, as indifferent or averse, is found in Psalm 3:7; Psalm 22:24; Psalm 27:9, &c.