By Pastor Dr. Ronnie W. Wolfe
The psalmist in this verse desires that God accept (be pleased with) the freewill offering of his mouth. We mostly think of offerings as money, but God accepts more than money for freewill offerings. He will accept praise (Heb. 13:15); he will accept the use of talents (Matt. 25:22); he accepts our witness (Acts 1:8); he accepts our preaching (1 Cor. 1:21) and other things.
As God accepts the freewill offering of our mouth (Eph. 6:19), it is only the LORD who can teach us the precepts of his word and persuade us in their understanding, for it is in him that is hidden the treasures of wisdom and knowledge (Col. 2:3).
So, we need not only to learn the word of God but also to acknowledge that God is our only teacher, and the Holy Spirit can give us knowledge and lead us toward truth, the only real and genuine truth.
Sometimes the word of God is sweet in the mouth but bitter in the belly (Rev. 10:10), but we must take the council of Psalms 19:14 Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O LORD, my strength, and my redeemer. Thus we can give God our freewill offering with our mouth.