God is the gospel

John Piper being clear and to the point on 1 Peter 3:18:

When all is said and done, God is the gospel. Gospel means "good news." Christianity is not first theology, but news. It is like prisoners of war hearing by hidden radio that the allies have landed and rescue is only a matter of time. The guards wonder why all the rejoicing.

But what is the ultimate good in good news? It all ends in one thing: God himself. All the words of the gospel lead to him, or they are not gospel. For example, salvation is not good news if it only saves from hell and not for God. Forgiveness is not good news if it only gives relief from guilt and doesn't open the way to God. Justification is not good news if it only makes us legally acceptable to God but doesn't bring fellowship with God. Redemption is not good news if it only liberates us from bondage but doesn't bring us to God. Adoption is not good news if it only puts us in the Father's family but not in his arms.

This is crucial. Many people seem to embrace the good news without embracing God. There is no sure evidence that we have a new heart just because we want to escape hell. . . [Fifty Reasons Why Jesus Came to Die, p. 62]