Forgiveness of sins and justification are good news because they remove obstacles to the only lasting, all-satisfying source of joy: Jesus Christ. Jesus Christ is not merely the means of our rescue from damnation; he is the goal of our salvation. If he is not satisfying to be with, there is no salvation. He is not merely the rope that pulls us from the threatening waves; he is the solid beach under our feet, and the air in our lungs, and the beat of our heart, and the warm sun on our skin, and the song in our ears, and the arms of our beloved.
The gospel is the good news that the everlasting and ever-increasing joy of the never-boring, ever-satisfying Christ is ours freely and eternally by faith in the sin-forgiving death and hope-giving resurrection of Jesus Christ.