Charles H. Spurgeon on Psalms 138:8

The LORD will perfect, etc. God's work is perfect, man's is clumsy and incomplete. God does not leave off till he has finished. When he rests, it is because, looking on his work, he sees it all "very good." His Sabbath is the Sabbath of an achieved purpose, of a fulfilled counsel. The palaces which we build are ever like that in the story, where one window remains dark and without jewels, while the rest blaze in beauty. But when God builds none can say, "He was not able to finish." In his great palace he makes her "windows of agates", and all her "borders of pleasant stones." I suppose that if the medieval dream had ever come true, and an alchemist had ever turned a grain of lead into gold, he could have turned all the lead in the world, in time, and with crucibles and furnaces enough. The first step is all the difficulty, and if you and I have been changed from enemies into sons, and had one spark of love to God kindled in our hearts, that is a mightier change than any that yet remains to be effected in order to make us perfect. One grain has been changed, the whole mass will be in due time. —Alexander Maclaren, Sermon in "Wesleyan Methodist Magazine," 1879.