In Psalm 71:17, David spoke these words, "Forsake me not till I have showed thy strength unto this generation and thy power to every one that is to come." Though we can look at these words as spoken concerning the Lord Jesus Christ, yet they were spoken of David and every saint of God. When John Newton was too old and weak to walk up into his pulpit, they carried him. His friends told him he should quit preaching because of his weakness, but he said, "What? Shall the old African blasphemer ever leave off preaching the grace of his Master as long as there is breath in his body? No, never."