The gospel produces sustained obedience

Tullian Tchividjian:

When John (or Jesus) talks about keeping God’s commands as a way to know whether you love Jesus or not, he’s not using the law as a way to motivate. He’s simply stating a fact. Those who love God will keep on keeping his commands. The question is how do we keep God’s commands? What sustains a long obedience in the same direction? Where does the power come from to do what God commands? As every parent and teacher knows, behavioral compliance to rules without heart change will be shallow and short-lived. But shallow and short-lived is not what God wants (that’s not what it means to “keep God’s commands.”). God wants a sustained obedience from the heart. How is that possible? Long-term, sustained, gospel-motivated obedience can only come from faith in what Jesus has already done, not fear of what we must do. To paraphrase Ray Ortlund, any obedience not grounded in or motivated by the gospel is unsustainable.

(from an interview with JT)