Read Dane Ortlund, The Radical Gospel, Defiant and Free. The heart of the article:
…so to startle this restraint-free culture with the gospel of free justification that the functional justifications of human approval, moral performance, sexual indulgence, or big bank accounts begin to lose their vice-like grip on human hearts and their emptiness is exposed in all its fraudulence. It sounds backward, but the path to holiness is through (not beyond) the grace of the gospel, because only undeserved grace can truly melt and transform the heart. The solution to restraint-free immorality is not morality. The solution to immorality is the free grace of God—grace so free that it will be (mis)heard by some as a license to sin with impunity. The route by which the New Testament exhorts radical obedience is not by tempering grace but by driving it home all the more deeply.