Whose gospel?

Isn’t the more important question about whether Paul preached Jesus’ gospel? Moreover, there’s another problem: Piper’s assumption is that justification is the gospel. The Calvinist crowd in the USA—and Piper is the leading influencer in the resurgence of Calvinist thinking among evangelicals—has defined the gospel in the short formula “justification by faith.” But we have to ask whether the apostles defined the gospel this way. Or, better yet, when they preached the gospel, what did they say?— The King Jesus Gospel, page 25

<idle musing>
Ah, that is the question, isn't it? We revere Paul so much that we start with him rather than with Jesus or the other apostles. Not that Paul is wrong, but without the added input of what Jesus and the apostles taught, we can put undue emphasis on certain aspects of Paul that the early church—and Paul himself—didn't...
</idle musing>