What does it mean for the gospel to be a declaration?

The gospel as a declaration emphasizes that it is not merely a set of suggestions or ideas but a definitive statement about God's work in Christ. Paul declares that he preached the gospel—the good news of Christ's death and resurrection—as a factual and unalterable truth (1 Corinthians 15:1-2). This declaration is meant to call sinners to repentance and faith, outlining God’s command for all men everywhere to believe. The gospel's character as a declaration signifies its authority and the necessity of human response to it.