Aeterni Patris - Introduction

Introduction

In August 1879, eighteen months into his pontificate, Pope Leo XIII (formerly Joachim Cardinal Pecci, bishop of Perugia), issued the encyclical letter Aeterni Patris. The aim of the encyclical was to aid and advance the restoration of Christian philosophy, which had fallen into danger and disrepute by adhering to modern trends in secular philosophy, by urging a return to the scholastic thinkers of the Middle Ages, most especially the Angelic Doctor St. Thomas Aquinas, and the related philosophical system of Thomism. The encyclical attempts to clarify the roles of faith and philosophy (later to be covered again in John Paul II's encyclical, Fides et Ratio Faith and Reason]), showing how most beneficially each may profit from the other.

According to the encyclical, the philosophy most conformable and useful for the faith is that of St. Thomas. The vigorous reintroduction of St. Thomas into the Catholic philosophical teaching was perceived by many as a bold and unprecedented step by the new pope. Indeed, since the French Revolution, most pontiffs had preferred to condemn the errors in contemporary philosophy, not to recommend explicitly a return to the old. The encyclical, however, was no surprise to any acquainted with Cardinal Pecci, who had for years been spearheading a Thomistic renaissance in the schools in his diocese of Perugia, leading to such theologians and philosophers as Reginald Garrigou-Lagrange, Etienne Gilson, and Jacques Maritain.

The interpretations and effects of the encyclical have been varied, some using it to authorize a return to a strict adherence to St. Thomas, others believing the document urges more a return to the spirit of Thomistic thinking. However various the effects may have been, the document has at least succeeded in reestablishing since its promulgation St. Thomas as a central figure in Catholic philosophy.