Tuesday after the sixth Sunday after Trinity

Bonaventure was born John of Fidanza in 1221 at Bagnoregio in the Papal States (near modern Viterbo, Italy). According to Franciscan tradition, he was healed of a childhood illness through the intercession of Saint Francis, which inspired his later devotion to the Seraphic Father. He studied at the University of Paris, where he encountered the Franciscan intellectual tradition and eventually joined the Order of Friars Minor c. 1243. He completed his training under Alexander of Hales, the leading Franciscan theologian of the era. Bonaventure earned his doctorate in theology from Paris in 1253 and served as a regent master, lecturing on Scripture and the Sentences of Peter Lombard. His reputation for both intellectual rigor and spiritual depth grew rapidly. In 1257, at the remarkably young age of thirty-six, he was elected Minister General of the entire Franciscan order—a position he held for seventeen years. During this period, he faced the critical challenge of holding together the order's observant and conventional factions following Francis's death. He reformed the Rule, compiled standardized constitutions, and wrote the Legenda Maior (official biography of Francis), which displaced earlier biographies. His theological writings during this period included the Itinerarium Mentis in Deum (The Soul's Journey Into God), the Breviloquium (summary of theology), and the Collationes in Hexaemeron (spiritual interpretation of creation). In 1273, Pope Gregory X created him a Cardinal and appointed him Bishop of Albano. Bonaventure attended the Second Council of Lyon (1274), where he played a key role in ecclesiastical affairs. He died at Lyon on July 15, 1274, the same year as Thomas Aquinas. Bonaventure was canonized in 1482 and declared a Doctor of the Church in 1588. Unlike Thomas's systematic theology, Bonaventure's work emphasizes the spiritual journey of the soul toward mystical union with God, informed by Franciscan emphasis on love, poverty, and contemplation.

Bonaventure is remembered in Franciscan tradition as the mystic-reformer who preserved the integrity of Francis's vision amid internal conflict. The Itinerarium Mentis in Deum, his most famous work, describes the soul's ascent through stages of contemplation toward mystical union with God—a progressive interior journey that became paradigmatic for Franciscan spirituality. His vision emphasizes Christ's poverty, the cross, and the imitation of Francis as a modern Francis. Bonaventure is called the 'Seraphic Doctor' because he represents the affective, love-centered spirituality of Francis (the Seraph at Alverna), in contrast to Thomas Aquinas's more intellectualist approach.