The gospel is both “comfort” and “call”. In this historical account (but probably not part of John’s original gospel), we see a picture of the comfort the gospel gives: gracious compassion to the vulnerable, and full forgiveness to the sinful & guilty. We also see the call of the gospel: at the same time the gospel offers “no condemnation” towards sinners, neither does it condone sin but calls us to a life of radical repentance. Those who experience the forgiveness of Jesus, then also turn from their sin and walk with him.