1 John 1:6

1:6 If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:

1 John 5:4-5

5:4 For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, [even] our faith. 5:5 Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?