THE REJECTED STONE
The word “Gospel” is not to be confused with a mere music genre, but is a translation of the Greek “Evangelion”, which means “good news”. The good news is that ancient promise of life, that found its fulfilment in the person and works of Jesus Christ; namely the death and resurrection of Christ for our sins. All of Scripture points to the Gospel. It is the central doctrine in the Christian faith.
Though it's possible to talk about the Gospel in a wide sense, which pertains to everything Jesus said, which includes the Law and the repentance of sins, in its specific or proper sense, the Gospel is God's grace, apart from works. What this means is that even though we’re naturally evil, rebellious and dead in sin – only worthy of eternal condemnation – God in His great mercy and love gave us Christ Jesus for the forgiveness of sins; that whoever believes in Him shall not perish, but have eternal life.
The good news is that people are not justified before God by their own strength, merits, or works, but are freely justified for Christ’s sake, through faith, when they believe that they are received into favour, and that their sins are forgiven for Christ’s sake, who, by His death, has made satisfaction for our sins. This faith God imputes for righteousness in His sight. The Gospel is not a new kind of law that requires our works. The only good works required by the Gospel is the good works of Christ, that is credited to us through faith.
In short, the Gospel is that Jesus Christ died and was raised for us, so that we too, through faith, may die and be raised to life through Christ.
"For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life. For God did not send his Son into the world to condemn the world, but in order that the world might be saved through him."