The gospel isn’t simply a set of truths that non-Christians must believe in order to become saved. It’s a reality that Christians must daily embrace in order to experience being saved. The gospel not only saves us from the penalty of sin (justification), but it also saves us from the power of sin (sanctification) day after day. Or, as John Piper has said, “The cross is not only a past place of objective substitution; it is a present place of subjective execution.” Our daily sin requires God’s daily grace—the grace that comes to us through the finished work of Jesus Christ.
Churches, for example, have for years debated whether their worship services ought to be geared toward Christians (to encourage and strengthen them) or non-Christians (to appeal to and win them). But this debate and the struggle over it are misguided. We’re asking the wrong questions and making the wrong assumptions. The truth is that our worship services should be geared to sinners in need of God’s rescue—and that includes both Christians and non-Christians. Since both groups need his deliverance, both need his gospel.
Christians need the gospel because our hearts are always prone to wander; we’re always tempted to run from God. It takes the power of the gospel to direct us back to our first love. Consciously going to the gospel ought to be a daily reality and experience for us all. It means, as Jerry Bridges reminds us, “preaching the gospel to yourself every day.” We have to allow God to remind us every day through his Word of Christ’s finished work on behalf of sinners in order to stay convinced that the gospel is relevant.
Taken from “A Continuing Requirement” by Tullian Tchividjian (used by permission).