He took the name
Isidorus Clarius at his
profession as a
Benedictine on 24 June 1517 at the abbey of Saint John in
Parma. He made rapid progress in both sacred and secular literature. During his years in Parma, he appears to have suffered from continual intestinal problems. In 1527, he wrote to his friend Leander at Modena that it felt like the cave of the winds. In the autumn when he was in Brescia, he consulted a physician, who prescribed asses' milk. In 1528 he travelled with some brothers to the monastery of Torchiara (Turres Claras), on orders of
Pope Clement VII who had assigned the monastery in Parma to other occupants. But the size of Torchiara was such that it could not hold all the brothers, and therefore, after complaints to Rome, with papal permission they returned to Parma. In 1534 he was at Montecassino, and in c. 1535 he and his mentor (
praeceptor) Gregory Cortese were transferred to Rome. Corteste had been appointed to
Pope Paul III's
Concilium delectorum cardinalium et aliorum praelatorum de emendanda Ecclesia. Esteemed as well for his purity, charity, and eloquence, he was appointed
prior of the monastery of St Peter in
Modena in 1537. His mentor, Gregory Cortese, wrote to Cardinal Gasparo Contarini, expressing the hope that Chiari would be consoled by the pleasing conversation. In 1540 he was summoned to Mantua to attend the General Chapter of the Benedictine Order, where he presented a public oration. He was elected
abbot of the monastery of Pontida in the diocese of Brescia, then of S. Maria di Cesena. He was still abbot of S. Maria when he appeared at the opening of the
Council of Trent. ==Scholar==