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.
Ye - emphatic. YE who confess Jesus: in contrast to 'them,' the false teachers.
Overcome (1 John 5:4-5) - instead of being 'overcome, and brought into (spiritual) bondage' by them (John 10:5; John 10:8; 2 Peter 2:19).
He that is in you God of whom ye are He that is in you - God, of whom ye are.
He that is in the world - the spirit of Antichrist, Satan, "the prince of this world."