1 John 4:4

In these verses the apostle encourages the disciples against the fear and danger of this seducing antichristian spirit, and that by such methods as these: - 1. He assures them of a more divine principle in them: "You are of God, little children, Jo1 4:4. You are God's little children. We are of God, Jo1 4:6. We are born of God, taught of God, anointed of God, and so secured against infectious fatal delusions. God has his chosen, who shall not be mortally seduced." 2. He gives them hope of victory: "And have overcome them, Jo1 4:4. You have hitherto overcome these deceivers and their temptations, and there is good ground of hope that you will do so still, and that upon these two accounts:" - (1.) "There is a strong preserver within you: Because greater is he that is in you than he that is in the world, Jo1 4:4. The Spirit of God dwells in you, and that Spirit is more mighty than men of devils." It is a great happiness to be under the influence of the Holy Ghost. (2.) "You are not of the same temper with these deceivers. The Spirit of God hath framed your mind for God and heaven; but they are of the world.

— Matthew Henry's Concise Commentary (public domain)

Ye--emphatical: YE who confess Jesus: in contrast to "them," the false teachers. overcome them-- (Jo1 5:4-5); instead of being "overcome and brought into (spiritual) bondage" by them (Pe2 2:19). Joh 10:8, Joh 10:5, "the sheep did not hear them": "a stranger will they not follow, but will flee from him: for they know not the voice of strangers." he that is in you--God, of whom ye are. he that is in the word--the spirit of Antichrist, the devil, "the prince of this world."

— Jamieson-Fausset-Brown Commentary (public domain)