4:21. And this commandment we have from God, that he who loveth God love also his brother.
1 John 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.
5:1. Whosoever believeth that Jesus is the Christ, is born of God. And every one that loveth him who begot, loveth him also who is born of him.
Is born of God... That is, is justified, and become a child of God by baptism: which is also to be understood; provided the belief of this fundamental article of the Christian faith be accompanied with all the other conditions, which, by the word of God, and his appointment, are also required to justification; such as a general belief of all that God has revealed and promised: hope, love, repentance, and a sincere disposition to keep God's holy law and commandments.
5:2. In this we know that we love the children of God: when we love God and keep his commandments.
5:3. For this is the charity of God: That we keep his commandments. And his commandments are not heavy.
5:4. For whatsoever is born of God overcometh the world. And this is the victory which overcameth the world: Our faith.
Our faith... Not a bare, speculative, or dead faith; but a faith that worketh by charity. Gal. 5.6
5:5. Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?