1 John 3:1; 1 John 3:8; 1 John 4:3; 1 John 4:5

1 Behold , what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not.
8 He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested , that he might destroy the works of the devil.
3 And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come ; and even now already is it in the world.
5 They are of the world: therefore speak they of the world, and the world heareth them.