The closing discussion returns to the name of Jesus and his prophetic office. The central distinction is between believing in Jesus’ authentic mission, truthfulness and divine guidance, and affirming that he shares in divinity.
Confirming a messenger means affirming that he was sent by God and faithfully conveyed divine truth. Affirming deity is a different and far stronger metaphysical claim. Evidence for the former is not automatically evidence for the latter.
This distinction brings the earlier arguments together: a title is not identical to an essence, an envoy is not the authority who sends him, a miracle does not confer independent creative power, and being foretold does not itself make the foretold person divine.