John Gills Exposition of the Bible Commentary - Psalms 71:18
Now also, when I am old and grayheaded, O God, forsake me not ,.... A repetition of his request, Psalm 71:9 ; with a reason annexed to it, suggested in the following words: until I have showed thy strength unto this generation ; or, "thine arm" F5 זרועך "brachium tuum", V. L. Pagninus, Montanus, Tigurine version, Junius & Tremellius, Piscator, &c.; ; which sometimes the Messiah, Isaiah 53:1 ; who is the power of by whom he made the worlds, and in whom all things... read more
John Gills Exposition of the Bible Commentary - Psalms 71:17
O God, thou hast taught me from my youth ,.... The corruption of human nature; the weakness and impotence of it, to everything that is spiritually good; and the need of continual strength and grace from Christ, to go to him for righteousness and strength, life and salvation, and to walk by faith on him; the doctrine of justification by the righteousness of Christ, and the insufficiency of his own; the will, ways, and worship of God; and all the duties of religion, prayer, praise, &c.;... read more