On Psalm 19:11–14
Here is one who has come under the influence of the divine word. He finds himself warned, ‘enlightened’ and enriched (great reward) through obedience (11); convicted of sin and ready to seek forgiveness (12), given new aspirations and longing to be blameless (13), ‘perfect’, in every part and integrated as a whole—just like the word itself (7) and in particular (14) acceptable to God in speech. If he is known by the word he speaks (7–10), should not we be also? The creation is silent but we must not be. How is such a life of obedience to be sustained? Only by resorting to the Lord himself in his Rock-strength and reliability and in his graciousness as the Redeemer, the next-of-kin who takes all our needs as his own (Ru. 3:13).
J. A. Motyer, “The Psalms,” in New Bible Commentary: 21st Century Edition, ed. D. A. Carson et al., 4th ed. (Leicester, England; Downers Grove, IL: Inter-Varsity Press, 1994), 498.