Blasphemy

Blasphemy is speech or action that treats God, or what belongs to God, with contempt — a word Scripture uses both for direct words against the Most High and, more broadly, for reviling and slander of any kind.

The texts say that blasphemy is first of all an assault on God's name, and one he answers himself. In Isaiah 37:20 Hezekiah prays that the kingdoms of the earth may know that Yahweh alone is God, in the face of the Assyrian king's words against him. Daniel 7:25 describes a coming ruler who "will speak words against the Most High" and will wear out the saints and attempt to change the times and the law, so that arrogant speech against God is a mark of tyrannical end-time power. The same pattern appears in 2 Thessalonians 2:3, where rebellion and "the man of sin" precede the end, in 2 Peter 3:3, where mockers come in the last days, and in Revelation 2:9, which speaks of "the blasphemy of those who say they are Jews, and they are not" — interpreters differ over whether that means slander spoken against the church or a false claim to covenant identity, and the text does not settle it.

In the Gospels and epistles, blasphemy is a matter of the heart before it is a matter of the mouth. Mark 7:21–23 and Matthew 15:19 list blasphemies among the evils that come from within and defile a person, alongside murders, thefts, and false testimony. Linguistically, the underlying Greek term covers abusive speech and slander generally, not only speech against God, which is why it sits in vice lists beside deceit and coveting; Colossians 3:8 accordingly commands that anger, malice, slander, and shameful speaking be put away. First Timothy 1:13 records Paul calling himself a former blasphemer, persecutor, and insolent man who "obtained mercy because I did it ignorantly in unbelief," drawing a distinction the text treats as meaningful between contempt and ignorant unbelief. Hebrews 10:29 weighs the far greater guilt of one who tramples the Son of God, counts the blood of the covenant unholy, and insults the Spirit of grace; the Gospels likewise speak of a blasphemy against the Holy Spirit that is not forgiven (Matthew 12:31–32). Scripture itself treats blaspheming the divine name as a capital matter under the law (Leviticus 24:16).

Traditions read the term differently at several points. Rabbinic law, as recorded in the Mishnah, narrowed culpable blasphemy to pronouncing the divine Name, and Jewish and Christian understandings have not always overlapped. Among Christians, some treat the unforgivable sin as final impenitence, others as specifically attributing the work of the Spirit to Satan, and others as a sin no longer possible in the same form; traditions also differ over whether blasphemy is properly a matter for civil law or solely for God's judgment. What the texts consistently assume is that words about God are never merely words.

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.