| Barnes' Notes on the Bible Thou art good - See the Psalm 100:5, note; Psalm 107:1, note. And doest good - As the expression or manifestation of goodness. The goodness of God is not a mere sentiment; not mere feeling; not an inactive principle; not a mere wish: it finds expression in acts which tend to promote the happiness of his creatures everywhere. Teach me thy statutes - See Psalm 119:12, note; Psalm 119:26, note. As one of the acts of the divine goodness, the psalmist prays that God will make him more and more acquainted with his law.
Clarke's Commentary on the BibleThou art good - And because thou art good, thou doest good; and because thou delightest to do good, teach me thy statutes.
Gill's Exposition of the Entire BibleThou art good, and doest good,.... Essentially, originally, and only good, and the fountain of all goodness to his creatures; who does good to all men in a providential way, and especially to his own people; to whom he is good in a way of special grace and mercy, in and through his Son Jesus Christ; and even he is good to them, and does good to them, when he afflicts them; he makes their afflictions work for their good, either temporal, spiritual, or eternal; teach me thy statutes; as a fresh instance of goodness; this had been often desired, being what lay much on his mind, and was of moment and importance; see Psalm 119:12.
Geneva Study BibleThou art good, and doest good; teach me thy statutes.
Jamieson-Fausset-Brown Bible Commentary68. Compare as to the Lord Jesus (Ac 10:38).
Matthew Henry's Concise Commentary119:65-72 However God has dealt with us, he has dealt with us better than we deserve; and all in love, and for our good. Many have knowledge, but little judgment; those who have both, are fortified against the snares of Satan, and furnished for the service of God. We are most apt to wander from God, when we are easy in the world. We should leave our concerns to the disposal of God, seeing we know not what is good for us. Lord, thou art our bountiful Benefactor; incline our hearts to faith and obedience. The psalmist will go on in his duty with constancy and resolution. The proud are full of the world, and its wealth and pleasures; these make them senseless, secure, and stupid. God visits his people with affliction, that they may learn his statutes. Not only God's promises, but even his law, his percepts, though hard to ungodly men, are desirable, and profitable, because they lead us with safety and delight unto eternal life. | 
