How do we know the potency of the gospel?

The potency of the gospel lies in its divine origin, as Paul asserts in Romans 1:16 that it is the power of God for salvation to everyone who believes. This power is not limited to mere words or eloquence but effectively brings about transformation in those who receive it. The gospel confronts sin, reveals God's grace, and regenerates the heart—effectively ambushing our sinful nature and drawing us towards the divine light of Christ. Understanding this potency leads Christians to trust in the gospel as their primary tool in spiritual warfare.