The gospel is the good news of Jesus Christ. It is the very foundation of Christianity.
In John 10:10, Jesus said that he came so that we might have abundant life. Intuitively, you know there is a big difference between existing and really living. Unfortunately, we all have a sin problem (Rom. 3:23) -- in one way or another, we've ignored God and tried to do things our own way -- and the consequence of sin is death (Rom. 6:23). More than just physical death, the death that the Bible describes is a spiritual condition that affects every part of who we are (Eph. 2:1-3). The good news? Even though we deserve just punishment for our sin, Jesus has paid the penalty for us! So, by God's grace alone through our faith in Jesus Christ alone, we can really live. Because of Jesus' sacrifice, we all have the opportunity to be forgiven, redeemed, and reborn (Eph. 2:4-10). A life of faith in Christ is not easy, but it is the most abundant life we could possibly live. Faith in Jesus Christ does not mean we get everything we want, it means that God gets to work in our lives, transforming us into the people he wants us to be. And when we humbly submit to his loving care, we can have a life rich in the things that matter most: love, joy, peace, patience, kindness, gentleness, and self-control (Gal. 5:16-24).