John M'Laurin (1693-1754) was one of the foremost Scottish doctrinal preachers of the eighteenth century. He took part in the revivals which occurred at Cambuslang about 1742, and in his correspondence with Jonathan Edwards contrived the transatlantic concert of prayer for revival. He was behind the efforts to provide financial relief when Edwards was impoverished after leaving Northampton, and M'Laurin's circle of friends in the Scottish Society for Propagating Christian Knowledge appointed David Brainerd their missionary to the American Indians. M'Laurin was a man of culture, and in many ways a counterpart to Edwards; his brother Colin was professor of mathematics at Edinburgh University, and a friend and interpreter of Isaac Newton. M'Laurin's sermons, and essays on such topics as grace and faith, have been extolled for their evangelical content, profundity of analysis, apologetic skill, and eloquence of composition. John Brown of Edinburgh commented that, "MacLaurin's thoughts have in a remarkable degree the characteristic mark of original genius they are singularly pregnant thoughts. They germinate in the mind. . . . There is a depth of spiritual feeling corresponding to the extent and clearness of his spiritual discernment." The present sermon, which was preached about 1720 in his first pastoral charge at Luss, Argyleshire, is from his Sermons and Essays, Glasgow 1755.