Chapter 1 - He declares what he has seen and heard of Christ who is the life eternal, to the end that we may have fellowship with God and all good through him. Yet so if we confess our sins. Chapter 2 - Christ is our advocate. We must keep his commandments and love one another. We must not love the world nor give ear to new teachers, but abide by the spirit of God in the church. Chapter 3 - Of the love of God to us. How we may distinguish the children of God and those of the devil. Of loving one another and of purity of conscience. Chapter 4 - What spirits are of God, and what are not. We must love one another, because God has loved us. Chapter 5 - Of them that are born of God, and of true charity. Faith overcomes the world. Three that bear witness to Christ. Of faith in his name and of sin that is and is not to death.