John introduces us to a word he has not used before in his Gospel or his first epistle. It is the word faith. He has of course inferred to faith by using a similar word like believeth. Because of this faith in the Lord Jesus we have the love of God shed abroad in our hearts by the Holy Ghost. We love one another as a result of this faith. We have victory over the world, the flesh, and the devil all due to this fact of faith.