Heresy

Heresy, in biblical usage, is a faction or party — a self-chosen school of teaching that gathers a following — and, by extension, the false teaching such a party promotes. Linguistically, the Greek word behind it, hairesis, means "choice," and in the wider Greek-speaking world it named the philosophical schools; historically, Jewish writers of the Second Temple period used it for the parties within Judaism, and the New Testament does the same when Paul's accusers call him a ringleader of the sect of the Nazarenes (Acts 24:5) and when Paul says he serves the God of his fathers according to the Way, which his opponents call a sect (Acts 24:14). In such places the word simply describes a group; it does not yet carry the later sense of condemned error.

The negative sense is already present, though. The text says false brothers were "secretly brought in, who stole in to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage" (Galatians 2:4), and the risen Christ commends the church at Ephesus for testing those who call themselves apostles and finding them false (Revelation 2:2). Paul treats factions (haireseis) among the Corinthians as a sifting through which those who are genuine become visible (1 Corinthians 11:19), lists hairesis among the works of the flesh (Galatians 5:20), and directs Titus to reject a factious person after a first and second warning (Titus 3:10); 2 Peter 2:1 speaks of false teachers who bring in destructive heresies. The word's career, then, runs from "party" to "party-spirit" to "destroying teaching."

Scripture's counterweight to error is presented less as a technique of doctrinal policing than as a formed life. Paul, on trial, describes his own practice as "always having a conscience void of offense toward God and men" (Acts 24:16). Second Peter 1:5-7 builds diligence, moral excellence, knowledge, self-control, perseverance, godliness, brotherly affection and love into a single chain, and promises that where these abound a person is neither idle nor unfruitful in the knowledge of Christ (2 Peter 1:8), while the one who lacks them is blind and has forgotten the cleansing from his old sins (2 Peter 1:9); stability comes from being established "in the present truth" (2 Peter 1:12). One way to read this is that heresy is diagnosed in Scripture as much by its moral and communal fruit — bondage, division, exploitation — as by its propositions.

Traditions differ sharply over who may define heresy and with what effect. In the Catholic tradition it is a defined canonical category: the obstinate denial or doubt, by a baptized person, of a truth to be believed with divine and catholic faith, judged by the Church's teaching office. Orthodoxy tends to locate the criterion in the consensus of the fathers and the received conciliar faith rather than in a single juridical act. Protestant bodies generally use the word for denial of what they take to be the gospel's core — commonly the Trinity, the person of Christ, or justification by faith — and disagree among themselves about how far the category reaches, some remaining wary of it as an instrument of control. Historically, the label was at times enforced by civil penalty, including execution, in medieval and Reformation-era Europe, a practice nearly all contemporary churches now repudiate. Many traditions also distinguish heresy from schism, a breach of communion, and from apostasy, an abandonment of the faith, though they draw those lines differently.

AI-generated reference entry, grounded in the passages where this term appears — history and Scripture stated as such, interpretation labeled as interpretation. Not a substitute for the text itself.