When John says you have overcome them.... who do you believe them are?
4 Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
2 Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God:
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.
4 Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.
5 They are of the world: therefore speak they of the world, and the world heareth them.
6 We are of God: he that knoweth God heareth us; he that is not of God heareth not us. Hereby know we the spirit of truth, and the spirit of error.
Them . . . every spirit who is the spirit of antichrist, the false teachers, those who deny Christ come in the flesh. Those who are of the world.
By this you know the Spirit of God: every spirit that confesses Jesus Christ is come in the flesh . . .
The Spirit of God . . . every spirit that confesses . . .
No one can say Jesus is Lord by by the Holy Spirit, and every spirit that confesses Jesus Christ is come in the flesh, by this you know the Spirit of God. You know God's Spirit by other people's spirits who are correct towards God. Who have the right mind, the mind of Christ.
Those who would try to overcome us through their false teachings. The spirit of error.
This is a pretty deep passage, we could look at it on another thread together if you want.
Much love!