But now in Christ Jesus you who formerly were far off have been brought near by the blood of Christ. For He Himself is our peace, who made [Jews and Gentiles] into one, and broke down the barrier of the dividing wall… And He came and preached peace to you who were far away, and peace to those who were near; for through Him we both have our access in one Spirit to the Father. (Eph 2:13-14, 17-18)
This is why the Gospel is such good news: it is, at the root, an offer of peace. Not an offer of peace that comes from a friend you just had an argument with, but an offer of peace from a King you have taken up arms against. Instead of simply crushing the rebellion, the King sends an Ambassador with an offer of peace: Lay down your weapons and come home. The King will grant you amnesty. In fact, he will bring you into His family. To hardened rebels who are far off and who are near, the word goes out: You cannot win this war. But the King offers you peace.