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The Exorcist — "The power of Christ compels you"

Invented Film 1973

The phrase is invented for the film. The biblical formula for exorcism is a direct command in Jesus's name, not this phrase.

What the work does

Father Merrin and Father Karras repeat "The power of Christ compels you" over Regan during the exorcism ritual.

Biblical source

None — the phrase is a cinematic invention. The biblical exorcism model is a direct command in Jesus's name (Acts 16:18; Mark 16:17). The Catholic Rituale Romanum (1614; rev. 1999) does not contain this formula either.

What the text actually says

Acts 16:18 (BSB): "She did this for many days. Finally Paul grew so troubled that he turned and said to the spirit, 'In the name of Jesus Christ I command you to come out of her!' And the spirit left her at that very moment." Mark 16:17 (in the longer ending) lists casting out demons "in My name" among the signs accompanying believers.

Verdict

The line is a cinematic invention. The Catholic Rite of Exorcism (Rituale Romanum) — both the historic 1614 form and the 1999 revision — uses different language and does not contain this specific phrase. The biblical model in Acts 16:18 is a brief, direct command: "In the name of Jesus Christ I command you to come out of her!"

What the Bible actually shows

The clearest New Testament exorcism narrative is Acts 16:16–18. Paul, repeatedly followed by a slave girl with a “spirit of divination,” eventually addresses the spirit directly:

“In the name of Jesus Christ I command you to come out of her!” (Acts 16:18, BSB)

The form is brief and unambiguous: a command, in Jesus’s name. The Gospels record Jesus himself casting out demons with comparable brevity — usually a single command (Mark 1:25; Mark 5:8; Mark 9:25; Luke 4:35).

The actual Catholic rite

The traditional Rituale Romanum exorcism rite (codified in 1614, revised in 1999) is a long liturgical sequence: prayers from the Psalms, the Pater Noster, invocations of saints, readings from John 1, an address to the unclean spirit, and the imperative formula. The classical formula in the Rituale is “Exorcizo te” — “I exorcise you” — addressed to the spirit, followed by appeals to specific moments of Christ’s ministry.

“The power of Christ compels you” does not appear as a fixed formula in either the 1614 or 1999 Catholic rites. It is, however, a reasonable English paraphrase of the rite’s overall theological claim — that the exorcist’s authority comes not from the exorcist but from Christ. The film captures that theology while introducing a phrasing that has, post-1973, sometimes been treated as if it were liturgical.

What this means

The film’s phrase is a cinematic creation. It captures a real theological idea (the exorcist’s derivative authority) in a memorable English form. It is not a Bible verse and not part of the codified Catholic rite.