So shall I {b} have wherewith to answer him that reproacheth me: for I trust in thy word.

(b) By trusting in God's word he assures himself to be able to confute the slanders of his adversaries.

King James Translators' Notes

So...: or, So shall I answer him that reproveth me in a thing

Scofield Reference Notes

Margin trust

See Scofield Note: "Ps 2:12".

Jamieson-Fausset-Brown Bible Commentary

42. The possession of God's gift of "salvation" (Ps 119:41) will be the Psalmist's answer to the foe's "reproach," that his hope was a fallacious one.

Matthew Henry's Concise Commentary

119:41-48 Lord, I have by faith thy mercies in view; let me by prayer prevail to obtain them. And when the salvation of the saints is completed, it will plainly appear that it was not in vain to trust in God's word. We need to pray that we may never be afraid or ashamed to own God's truths and ways before men. And the psalmist resolves to keep God's law, in a constant course of obedience, without backsliding. The service of sin is slavery; the service of God is liberty. There is no full happiness, or perfect liberty, but in keeping God's law. We must never be ashamed or afraid to own our religion. The more delight we take in the service of God, the nearer we come to perfection. Not only consent to his law as good, but take pleasure in it as good for us. Let me put forth all the strength I have, to do it. Something of this mind of Christ is in every true disciple.

Matthew Henry's Whole Bible Commentary

Verses 41-42

Here is, 1. David's prayer for the salvation of the Lord. "Lord, thou art my Saviour; I am miserable in myself, and thou only canst make me happy; let thy salvation come to me. Hasten temporal salvation to me from my present distresses, and hasten me to the eternal salvation, by giving me the necessary qualifications for it and the comfortable pledges and foretastes of it." 2. David's dependence upon the grace and promise of God for that salvation. These are the two pillars on which our hope is built, and they will not fail us:-(1.) The grace of God: Let thy mercies come, even thy salvation. Our salvation must be attributed purely to God's mercy, and not to any merit of our own. Eternal life must be expected as the mercy of our Lord Jesus Christ, Jude 21. "Lord, I have by faith thy mercies in view; let me by prayer prevail to have them come to me." (2.) The promise of God: "Let it come according to thy word, thy word of promise. I trust in thy word, and therefore may expect the performance of the promise." We are not only allowed to trust in God's word, but our trusting in it is the condition of our benefit by it. 3. David's expectation of the good assurance which that grace and promise of God would give him: "So shall I have wherewith to answer him that reproaches me for my confidence in God, as if it would deceive me." When God saves those out of their troubles who trusted in him he effectually silences those who would have shamed that counsel of the poor (Ps. 14:6), and their reproaches will be for ever silenced when the salvation of the saints is completed; then it will appear, beyond dispute, that it was not in vain to trust in God.