How do we know the gospel is unchanging?

The unchanging nature of the gospel is emphasized in the sermon by pointing out that the gospel is not fluid or adaptable; it is established and set by God's eternal character and purpose. Paul asserts that any attempt to modify the gospel to please human sensibilities results in a perversion. He reinforces that the gospel existed from all eternity, originating from God's will. This unchanging message is manifested throughout Scriptures, where God’s faithfulness and truth serve as the foundation upon which believers can rely consistently, regardless of cultural or temporal shifts. Thus, any alteration to the gospel undermines its divine authority and transforms it into something that cannot save.