Direct Answer
Based on the transcript, testing the message would mean open-Bible examination of the key texts he used (Acts 2/Psalm 16/John 5–6/Romans 5–6–8/1 Corinthians 15), alongside a humble willingness to be corrected and to actually change behavior if the texts demand it. “Personally costly” would include dying to self, yielding members to righteousness, and inviting accountability rather than just debating ideas.