The strength of Sin : And how the law is the strength thereof, opened up and unfolded in several sermons preached at Kinglassy 31 July; at Orwel, 7 and 8 August 1727, after the administration of the Sacrament of the Lord's Supper: and enlarged upon, elsewhere, on other occasions, from By Mr. Ralph Erskine minister of the Gospel at Dunfermline.