He who says, "I have come to know Him," and does not keep His commandments, is a liar, and the truth is not in him.

If we claim that we have fellowship with Him, and we are walking in the darkness, we are lying, and are not practicing the truth.

If anyone claims, "I love God," and hates his brother, he is a liar; for he who does not love his brother whom he has seen, how is it possible [for him] to love God whom he has not seen?

You are of your father the devil, and the lusts of your father you desire to do. He was a murderer from the beginning, and has not stood in the truth, because there is no truth in him. When he tells a lie, he speaks from his own [resources], for he is a liar, and the father of lies.

Behold, I will give those of the synagogue of Satan, those who say they are Jews and are not, but they are lying-behold, I will compel them to come and bow down at your feet, and they shall know that I have loved you.

Everyone who denies the Son does not have the Father either.

and every spirit which does not confess that Jesus Christ has come in the flesh is not of God. And this is the [spirit] of the Antichrist, which you have heard that it is coming, and now is already in the world.

You know that when you were Gentiles, how you were led, being carried away to these speechless idols.

Therefore I make known to you that no one speaking by the Spirit of God says "Jesus be cursed," and no one can say that Jesus [is] Lord except by the Holy Spirit.

Because many deceivers have gone out into the world who do not confess Jesus Christ as coming in the flesh. This is a deceiver and the antichrist.

For certain men have crept in unawares, who long ago were marked out for this condemnation, ungodly men, changing the grace of our God into licentiousness and denying the only Master God and our Lord Jesus Christ.

Little children, it is the last hour; and just as you have heard that the Antichrist is coming, even now many antichrists have appeared; from this we know that it is the last hour.