It is not a small thing to believe that God truly does love his people deeply and faithfully. Typical human experience tells us that love is fickle, and surely none of us would tolerate the unfaithfulness we know we have exhibited toward God. Additionally, we have an enemy who whispers in our ear, “It is too good to be true. He cannot really love you. Not anymore. Not after what you have done.” This is why we need the affirmation of 4:9–10: so that we might make the confession of 4:16. Knowing and believing the love of God for us empowers us to love others in the way John teaches.