Apostasy is the abandonment or repudiation of a faith someone previously held. The word often carries a particular meaning within a religious tradition, and some people who leave a religion describe themselves in other terms. A person can cease believing, stop attending services, join another community or formally end a registered membership. These changes may occur together or at different times. Distinguishing them helps explain why a church, a survey researcher and a civil court can ask different questions about a departure.
What apostasy means in religious sources
Canon 751 of the Latin Catholic Church defines apostasy as the repudiation of the Christian faith as a whole. In the same provision, heresy concerns the obstinate denial of or doubt about a particular teaching to be believed with divine and Catholic faith after baptism. Schism concerns refusing communion with the pope or with the members of the Church subject to him. Under these definitions, renouncing Christianity and breaking communion with a church are different matters. The code’s penalty provisions address all three within the church’s own legal system. Catholic Code of Canon Law, canon 751 · Book VI of the Code, canon 1364
In the Quran, verse 2:217 discusses turning away from faith in a passage about conflict and pressure to abandon belief. It also describes the consequences for a person who repudiates faith and dies in unbelief, including judgment in the hereafter. Verse 2:256 speaks against compulsion in religion. The two passages concern related questions about belief and compulsion. A claim about a particular legal rule also requires identifying the jurists, legislation or court that gives the rule its form. Quran 2:217 · Quran 2:256
What people report when they leave a religion
In a May 2025 survey, Pew Research Center asked U.S. adults who had left the religion in which they were raised to rate several reasons for leaving. Forty-six percent said ceasing to believe the religion’s teachings was very or extremely important. Thirty-eight percent said the same about drifting away gradually. Among those who adopted another religion, 48 percent said feeling drawn to a new faith was very or extremely important. Respondents could rate several reasons highly. The answers document different experiences of leaving among those surveyed. Pew Research Center, reasons for leaving a childhood religion
Pew identifies religious switching by comparing what respondents say about their childhood and current affiliation. A respondent can report a change even if there was no public renunciation. A survey records the person’s identification and reported reasons. A religious body applying a rule about apostasy would have a different question and its own criteria. Pew’s explanation of its switching measure
Civil membership and freedom of belief
In a 2012 case from Baden-Württemberg, Germany’s Federal Administrative Court considered the effect of a declaration of departure submitted to a civil registrar. The dispute concerned wording that named the Roman Catholic Church as a corporation under public law. The court treated those words as part of the designation of the church and upheld the declaration in the civil procedure. Its reasoning distinguishes the state-law effect of the declaration from questions of membership that arise within the religious body. A decision about the form’s civil effect tells us little about what the person privately believed. German Federal Administrative Court, judgment 6 C 7.12 and court summary
Article 18 of the International Covenant on Civil and Political Rights protects freedom of thought, conscience and religion. The UN Human Rights Committee explains that this freedom includes keeping one’s religion or belief, replacing it with another or adopting atheistic views. The Committee also explains that coercion to adhere, recant or convert is prohibited. Its interpretation concerns the freedom of the person to decide what to believe. It applies to convictions that a person may never disclose in a civil declaration or a survey. UN Human Rights Committee, General Comment No. 22, paragraphs 3 and 5
Conclusion
What a departure means depends on what has changed and who is describing it. A religious body may use apostasy for a defined repudiation of faith. A person may describe a gradual change or a decision to join another religion. A state may record a declaration with civil effects. Keeping those meanings separate makes room for the variety of people’s experiences and for the freedom to keep, change or leave a belief.
Published by Ralf. About our editorial process.
