Verse 15. - But thou, O Lord, art a God full of compassion. The appeal is to God's own revelation of himself. He had declared that he was "merciful and gracious, long suffering, and abundant in goodness and truth, keeping mercy for thousands, forgiving iniquity and transgression and sin" (Exodus 34:6, 7); he could not, therefore, desert the psalmist in his need. And gracious, long suffering, and plenteous in mercy and truth (comp. above, ver. 5; and see also Numbers 14:18; Joel 2:13; Jonah 4:2).

86:8-17 Our God alone possesses almighty power and infinite love. Christ is the way and the truth. And the believing soul will be more desirous to be taught the way and the truth. And the believing soul will be more desirous to be taught the way and the truth of God, in order to walk therein, than to be delivered out of earthly distress. Those who set not the Lord before them, seek after believers' souls; but the compassion, mercy, and truth of God, will be their refuge and consolation. And those whose parents were the servants of the Lord, may urge this as a plea why he should hear and help them. In considering David's experience, and that of the believer, we must not lose sight of Him, who though he was rich, for our sakes became poor, that we through his poverty might be rich.But thou, O Lord, art a God full of compassion,.... Or merciful (t), in the most affectionate and tender manner, as a parent to its child, or particularly as a mother to the son of her womb; and is rich and plenteous in his mercy, and freely bestows it; and this was the support of the psalmist under his troubles from his enemies, that though they were cruel the Lord was merciful:

and gracious; so he has been in eternity, as appears by his election of grace, by the covenant of his grace, and the provisions of it in his Son; and so he is in time, as is manifest from his kindness in Christ Jesus, from his justification, pardon, adoption, effectual calling and salvation of his people, which are all of grace;

longsuffering; not only to wicked men, but to his chosen ones; which longsuffering of his is salvation to them; he bears with them, and waits to be gracious to them, to bring them to repentance, and save them, 2 Peter 3:9,

plenteous in mercy; or goodness; See Gill on Psalm 86:5, and truth: in fulfilling promises; see Exodus 34:6, to which these words refer.

(t) "misericors", Pagninus, Montanus, Junius & Tremellius, Piscator, &c.