6 Bible Verses about Heresies

Who is a liar, if not he who denies that Jesus is the Christ? He is the antichrist who denies the Father and the Son. Whoever denies the Son, does not acknowledge the Father.

Beloved, do not believe every spirit, but try the spirits, whether they be from God; because many false prophets are gone forth into the world. By this you know the Spirit of God: Every spirit that confesses Jesus Christ has come in the flesh, is from God. And every spirit that does not confess Jesus, is not from God: and this is that spirit of antichrist, which you have heard that it comes, and now is in the world already.

By this you know the Spirit of God: Every spirit that confesses Jesus Christ has come in the flesh, is from God. And every spirit that does not confess Jesus, is not from God: and this is that spirit of antichrist, which you have heard that it comes, and now is in the world already.

Therefore, beloved, foreknowing these things, be on your guard; lest being also carried away by the deceit of the lawless, you fall from your own steadfastness.

And through covetousness, they will make merchandise of you, by fictitious tales: to whom the punishment threatened of old lingers not, and their destruction slumbers not.

These are wells without water, clouds driven by a tempest; for whom the blackness of darkness is reserved forever: for, speaking great swelling words of falsehood, they allure by the lusts of the flesh, even by lasciviousness, those who have actually fled away from them who are living in error. They promise them liberty, whilst they themselves are slaves of corruption: for every one is enslaved by that which overcomes him.read more.
Now, if, having fled away from the pollutions of the world, through the knowledge of the Lord and Saviour Jesus Christ, and being again entangled, they are overcome by them; their last condition is worse than the first. Therefore, it has been better for them not to have known the way of righteousness, than having known it, turn away from the holy commandment delivered to them. But the saying of the true proverb has happened to them: "The dog is returned to his own vomit; and the washed hog, to its wallowing in the mire."