My tongue shall speak of your word: for all your commandments are righteousness.
Read Chapter 119
Augustine of Hippo
169. But as he hath now learned, and praised God his Teacher, he next wisheth to teach. "Yea, my tongue shall declare Thy word: for all Thy commandments are righteousness" (ver. 172). When he saith that he will declare these things, he becometh a minister of the word. For though God teach within, nevertheless "faith cometh from hearing: and how do they hear without a preacher?" For, because "God giveth the increase," is no reason why we need not plant and water.