3 Bible Verses about False Doctrine, Nature Of

Beloved, making all haste to write to you, concerning the common salvation, I thought it necessary to write to you, exhorting you to contend earnestly for the faith formerly delivered to the saints. For certain men have come in privily, who long ago were before written to this very condemnation; ungodly men, perverting the favor of our God to lasciviousness, and denying the only sovereign Lord, even our Lord Jesus Christ.

for many deceivers are entered into the world, who do not confess Jesus Christ did come in the flesh. This is the deceiver, and the antichrist.

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.