📖 Biblical Definition
A heretic in the biblical sense is not someone who holds a different opinion on secondary matters, but one who teaches doctrine that strikes at the foundations of the Christian faith. Paul warns Titus: "As for a person who stirs up division (hairetikon anthropon), after warning him once and then twice, have nothing more to do with him, knowing that such a person is warped and sinful; he is self-condemned" (Titus 3:10-11). Peter warns of "false teachers among you, who will secretly bring in destructive heresies, even denying the Master who bought them" (2 Peter 2:1). John commands the church not to receive those who deny Christ's incarnation: "If anyone comes to you and does not bring this teaching, do not receive him into your house" (2 John 1:10). Heresy is not disagreement; it is the corruption of saving truth.
📜 Webster 1828 Definition
A person under any religion, but particularly the Christian, who holds and teaches opinions repugnant to the established faith.
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HER'ETIC, n. [L. haereticus; Gr. hairetikos.] A person under any religion, but particularly the Christian, who holds and teaches opinions repugnant to the established faith, or that which is made the standard of orthodoxy. Webster understood heresy as deviation from established doctrinal standards, not mere disagreement.
📖 Key Scripture
• Titus 3:10-11 — "As for a person who stirs up division, after warning him once and then twice, have nothing more to do with him."
• 2 Peter 2:1 — "False teachers among you, who will secretly bring in destructive heresies, even denying the Master who bought them."
• Galatians 1:8-9 — "But even if we or an angel from heaven should preach to you a gospel contrary to the one we preached to you, let him be accursed."
• 2 John 1:9-11 — "Everyone who... does not abide in the teaching of Christ, does not have God."
⚠️ Modern Corruption
The modern church has made "heretic" a slur while tolerating actual heresy.
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Modern evangelicalism has two simultaneous problems with heresy. First, the word "heretic" has been weaponized as a casual insult hurled at anyone who disagrees on minor points. Second, and far more dangerous, actual heresy -- denial of Christ's deity, rejection of penal substitution, denial of bodily resurrection, universalism -- flourishes in mainstream denominations and seminaries without consequence. The early church labored over precise creedal definitions because they understood that wrong doctrine about God destroys souls. Today, calling someone a heretic is considered worse than actually being one. The biblical pattern is clear: heretics are to be warned, then rejected. The church that cannot identify heresy cannot protect its flock.
Usage
• "A heretic is not someone who disagrees about the timing of the rapture -- it is someone who denies that Christ is God, that He rose bodily, or that salvation is by grace through faith."
• "Paul's command is clear: warn the heretic twice, then cut off fellowship. Endless dialogue with false teachers is not patience -- it is negligence."