DA Carson provides an intriguing editorial in the latest issue of Themelios on the question of how we define the gospel. Here’s an excerpt:
In blogs, journal essays, and books, there has been quite a lot written recently about what “the gospel” is… [O]ne must distinguish between, on the one hand, the gospel as what God has done and what is the message to be announced and, on the other, what is demanded by God or effected by the gospel in assorted human responses. If the gospel is the (good) news about what God has done in Christ Jesus, there is ample place for including under “the gospel” the ways in which the kingdom has dawned and is coming, for tying this kingdom to Jesus’ death and resurrection, for demonstrating that the purpose of what God has done is to reconcile sinners to himself and finally to bring under one head a renovated and transformed new heaven and new earth, for talking about God’s gift of the Holy Spirit, consequent upon Christ’s resurrection and ascension to the right hand of the Majesty on high, and above all for focusing attention on what Paul (and others—though the language I’m using here reflects Paul) sees as the matter “of first importance”: Christ crucified. All of this is what God has done; it is what we proclaim; it is the news, the great news, the good news.
By contrast, the first two greatest commands—to love God with heart and soul and mind and strength, and our neighbor as ourselves—do not constitute the gospel, or any part of it. We may well argue that when the gospel is faithfully declared and rightly received, it will result in human beings more closely aligned to these two commands. But they are not the gospel. Similarly, the gospel is not receiving Christ or believing in him, or being converted, or joining a church; it is not the practice of discipleship. Once again, the gospel faithfully declared and rightly received will result in people receiving Christ, believing in Christ, being converted, and joining a local church; but such steps are not the gospel.