Encyclical of Leo XIV on artificial intelligence: a rule of Christian life in the age of the machine

Context

We had reported, in issue 3 (week 28), the acceleration of a European digital sovereignty against the dominant narrative. Leon XIV publishes his encyclical on artificial intelligence, a 245-paragraph text that La Croix describes, on July 10, 2026, as outlining, through doctrine, a true digital rule of life. This is not a technical manual: it is a Christian pedagogy of the relationship with the machine.

The Facts

In his column "Letter from the Vatican" on July 10, 2026, La Croix reports on this encyclical and extracts ten practical pieces of advice, a "small rule" drawn from a long and dense text. The publication comes as the Vatican's Interdicasterial Commission on AI, meeting for the first time on June 17, 2026, begins its first work: two dicasteries and three pontifical academies were already associated with the preparatory work.

Doctrinal Analysis

Christian anthropology is played out in its entirety in a distinction made by the magisterium: the machine can simulate speech, but it cannot speak. Fides et ratio (John Paul II, September 14, 1998, § 5) already recalled that truth is not a product of calculation, but a gift received by reason enlightened by faith. The Catechism (§ 2500-2502) specifies that truth and beauty bear within themselves the mark of the Creator, which the algorithm ignores by nature. The note Antiqua et Nova of the Dicastery for the Doctrine of the Faith and the Dicastery for Culture, published on January 28, 2025, had set the guidelines. Leon XIV's encyclical fits into this doctrinal continuity.

Stakes for the Church and the Faithful

The text imposes a spiritual hygiene: not to delegate one's prayer to a machine, not to let a statistical model arbitrate one's moral discernment, not to confuse efficiency and truth. For the institutional Church, the challenge is to organize this pedagogy: parish catechesis, training in the dioceses, public positions in European legislative debates on copyright, generative AI, and embryoids.

Critical Reading and Blind Spots

La Croix's synthesis is primarily aimed at the everyday user, leaving in the shadows the industrial question: are the frontier models produced by Anthropic or OpenAI compatible with this anthropology, or do they constitute a doctrinal test that the Church will have to face in the medium term? The relative silence of the major French-speaking Catholic media on the publication itself is a blind spot. Transhumanism, in particular, would deserve more explicit magisterial treatment in the next Roman interventions.

To Ponder and Act

Do not confuse the machine that speaks with the man who thinks. Choose consciously what one entrusts to the digital, and what one preserves for the living, sacred, praying word.