ACC ~ 1 John 4 v3

SPIRITS NOT OF GOD. DIDYMUS THE BLIND: If a spirit dissolves the divine-human unity of Christ and thinks that the pure Word of God is outside all flesh, and cannot really be a man, and states that everything done in his incarnation is a fantasy, then that spirit is not from God. But someone will say that there are many heretics who do accept the incarnation, the Montanists for instance. The answer to them is that just as no one says that Jesus is Lord except by the Holy Spirit, so the Montanists do not accept all the implications of incarnational belief. For those who say that Jesus is Lord but who do not follow his commandments do not have the Holy Spirit. Although they honor him with their lips, their hearts are far from him. COMMENTARY ON 1 JOHN.

EVERY SPIRIT THAT DOES NOT CONFESS JESUS. BEDE: John is talking here about people who deny the divinity of Christ or who say that he did not have a human soul or did not take on human flesh. But the person who misinterprets the commands and sayings of Jesus in a perverse way also denies him. So, too, does the person who upsets the unity of the church, which Jesus came to gather to himself. … The antichrist will come on the eve of the day of judgment. He will be a man born in the world but much more wicked than others, in fact the very son of iniquity. He is already in the world, dwelling in the minds of those who have rejected Christ either in word or in deed, to the point that there is no longer any hope for them. ON 1 JOHN.

LACKING THE SPIRIT OF CHRIST. OECUMENIUS: Paul said, “For while there is jealousy and strife among you, are you not of the flesh, and behaving like ordinary men?”Whoever walks in an ordinary human way does not have the Spirit of Christ and does not live according to his teaching, so clearly he is not of Christ. COMMENTARY ON 1 JOHN.

THE SPIRIT OF ANTICHRIST. THEOPHYLACT: The antichrist will be a man who bears Satan inside him and who exalts himself above everything which is called God or which is worshiped. For that reason he will spurn idolatry and demand that people worship him instead. COMMENTARY ON 1 JOHN.

1 Jn