Every sermon preached by every Christian in the New Testament centers on the resurrection. The gospel or “good news” means essentially the news of Christ’s resurrection. The message that flashed across the ancient world, set hearts on fire, changed lives and turned the world upside down was not “love your neighbor.” Every morally sane person already knew that; it was not news. The news was that a man who claimed to be the Son of God and the Savior of the world had risen from the dead.
From The Pocket Handbook of Christian Apologetics, page 69.