Sermon XIV, on Proverbs 30:12, "The Nature and Excellency of Purity Opened," in The Sermons and Other Practical Works of the Late Reverend Ralph Erskine, vol. 1 (London: William Tegg, 1865), p. 356

If you would use the law in a gospel manner, let not the duty the law requires, or the discovery the law makes, hinder you to embrace the offer that the gospel makes. The gospel offers Christ as a husband; the law saith,…