Many people think the Gospels are stories only about Jesus. But there were Caesar Gospels in the Roman Empire about the Caesars. The four Gospel accounts of Jesus are patterned after the Caesar Gospels.
The gospel of peace leads us into a life of peace. The gospel is not just about how to receive eternal life, but also about how to live this life. Any time we use the gospel to produce anything but peace, we are misusing and abusing the gospel. So follow Jesus into peace, for if you are not following Him into peace, you are not following Jesus.
Do you believe in eternal security? Paul did, and he clearly argued for it in Romans 8:29-39. He also responded to the common objections about eternal security. According to Paul, all who have been justified will be glorified, no matter what.