The Gospel is the work of the triune God in the person of Christ reconciling the world to Himself in the salvation of men, the final judgment of evil men and devils, and the restoration of all things. It is centered upon the death and the resurrection of Christ who has paid for sins penalty and rose to the place of supreme authority to give new life to both men and to their world.
It demands that men look by faith alone to Christ to be reconciled and promises that Christ will reconcile all things in heaven and earth to Himself for the glory of the Father and the good of those who believe.
The Gospel is the message of Christ being both our full payment for sin and our full righteousness for heaven. He gets our sin and we get his righteousness (2 Corinthians 5:21). I am saved by being both forgiven and given. I am forgiven my sins and I am given His righteousness.
The gospel declares that it is the power of Christ alone that saves dead sinners who cannot add an ounce of anything to their salvation (Ephesians 2:8). He justifies us by grace alone, through faith alone. Baptism will not justify, the church will not justify, the sacraments will not justify, nor will just being a nice person justify. Christ alone will justify. This means that it is he alone who will declare the sinner righteous through his death and his resurrection. This comes to us all by faith alone.
The Gospel then calls you to believe in Jesus alone- and your sins will be washed away and you will be given eternal life in Him.
The Gospel comes with the free offer to believe upon Christ and be saved. It is offered to all men and women and young people- no matter where they are from or what they have done.
It is God’s good news to every sinner, that if they will but look to Christ’s death to pay for their sins he will grant them forever forgiveness and eternal life.