Psalms 19:14 - Joseph Benson’s Commentary on the Old and New Testaments

Let the words of my mouth, &c. Having prayed that God would keep him from sinful actions, he now prays that God would govern and sanctify his words and thoughts. And this was necessary in order to his preservation, even from presumptuous sins, which have their first rise in the thoughts, and thence, probably, proceed to expressions before they break forth into actions. Be acceptable in thy sight Be really good and holy, and so well pleasing to thee. O Lord, my strength O thou who hast hitherto strengthened me, both against my temporal and spiritual enemies, and whose gracious and powerful assistance is absolutely necessary to keep me from being overcome by my sinful inclinations and other temptations. And my Redeemer This expression seems to be added emphatically, and with a special respect to Christ, to whom alone this word, גאל, goel, properly belongs. See notes on Job 19:25. Through his blood and Spirit alone did and could David expect the pardon and grace for which he here prays.