(12, 13) Comp. Psalm 56:13; Psalm 57:9-10.

Verse 12. - I will praise thee, O Lord my God, with all my heart; i.e. "with an undivided heart." And I will glorify thy Name (see ver. 9) forevermore. A belief in immortality is implied, if not formally asserted.

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.I will praise thee, O Lord my God, with all my heart,.... And under that consideration, that he was his God, and which itself is sufficient matter of praise; this makes him amiable, and such he is, love itself: this is a blessing of pure grace, and is the foundation of all other blessings, and continues for ever: this work of praise, which is no other than ascribing glory to God, and giving thanks unto him for mercies received, the psalmist determines to do with his whole heart, which is to be engaged in every spiritual service; even all of it, all that is within it, every power and faculty of the soul, Psalm 103:1, which is expressive not of perfection, but sincerity:

and I will glorify thy name for evermore; by celebrating the perfections of his nature, by giving him the glory of the works of his hands, by praising him for all favours, by devoting himself unto him, and by doing all things for his glory, and that for ever, in time as long as he lived, and to all eternity.