How do we know that true believers are protected from deception?

1 John 2:20 assures us that all true believers have an anointing from the Holy One, which equips them to know the truth. This protection safeguards them from the lies that antichrists propagate. The work of the Holy Spirit in the life of a believer, beginning at regeneration, ensures that they recognize and stand firm in the doctrine of Christ. As Matthew 24:24 warns, false prophets and antichrists will try to deceive even the elect, but the divine anointing acts as a shield against such deception.