The blasphemy against the Holy Spirit named by Christ as the one sin that has no forgiveness. Mark 3:28-30: Verily I say unto you, All sins shall be forgiven unto the sons of men, and blasphemies wherewith soever they shall blaspheme: But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation: because they said, He hath an unclean spirit. The context is decisive: the Pharisees, seeing Christ's miraculous works performed by the Spirit, attributed them to Beelzebub. The sin is not a single word but a settled, willful, irrevocable attribution of the Spirit's saving work to the devil — the heart that has so fully and finally hardened against the Spirit's testimony of Christ that it cannot repent. The genuinely worried Christian is, by definition, not committing it; the concern itself is evidence of the Spirit's ongoing work. The unforgivable sin is the final state of apostasy that no longer wants forgiveness.