The idea that PSA or JBF are the gospel is a problematic understanding of the gospel itself. While I like many of the thoughts of this article and believe they are good observations about Jesus and what he did, I don’t think they explain what the NT says the gospel actually is. Without a clear picture of the gospel itself, other related imagery in the NT will also be skewed.
The euangellion in the first century empire was a proclamation of the emperor’s victory in battle, his birthday, his ascension to the throne and assumption of authority, and the public good that he did for his subjects. The usage of the term in the NT is against this background. It is also against the background of its usage in Isaiah in the LXX, where the gospel was YHWH’s victory over the foreign gods of the pagans. It was the proclamation that the one true lord of the world was YHWH himself…Israel’s God.
This is all behind the proclamation of the gospel in the NT. It is the royal announcement that God has become king through his messiah…Jesus, Israel’s king, the one who is the true son of David. Except, Jesus’s assumption of authority and power, and his victory, happened not through military might, but through the paradox of his shameful death at the hands of the powers that be, and then by his resurrection from the dead on the third day, by which he was appointed lord of the world and of all. Jesus, as opposed to Caesar, was and is the world’s one true lord, bringing the kingdom/rule of God on earth as it is in heaven…a rule of love, peace, and justice for all who receive and join up by faith with Jesus as lord. He and his kingdom are akin to the stone hitting the feet of the image in Daniel 2, blowing away the oppressive regimes it represents, and filling the earth with the gracious and just rule of God, bringing freedom, healing, and restoration for all who join by faith.
This gospel of king Jesus is then the framework within which other issues can be explored…such as Atonement imagery, JBF, etc.