The gospel creates a gentle sense of irony
"... those who understand the gospel cannot possibly look down on anyone, since they were saved by sheer grace, not by their perfect doctrine or strong moral character.
Another mark of the moral-performance narrative is a constant need to find fault, win arguments, and prove that all opponents are not just mistaken but dishonest sellouts. However, when the gospel is deeply grasped, our need to win arguments is removed, and our language becomes gracious. We don't have to ridicule our opponents, but instead we can engage them respectfully.
People who live in the moral-performance narrative use sarcastic, self-righteous putdown humor, or have no sense of humor at all. Lewis speaks of "the unsmiling concentration upon Self, which is the mark of hell." The gospel, however, creates a gentle sense of irony. We find a lot to laugh at, starting with our own weaknesses. They don't threaten us anymore because our ultimate worth is not based on our record or performance."