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.

Thou art good - And because thou art good, thou doest good; and because thou delightest to do good, teach me thy statutes.

Thou 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.

Compare as to the Lord Jesus (Acts 10:38).