1 John 5:2-6

Hereby we know that we love the children of God, when we love God and do his commandments. For this is the love of God, that we keep his commandments: and his commandments are not grievous. For whatsoever is begotten of God overcometh the world: and this is the victory that hath overcome the world, even our faith. And who is he that overcometh the world, but he that believeth that Jesus is the Son of God? This is he that came by water and blood, even Jesus Christ; not with the water only, but with the water and with the blood.