 He wrote to Jerome, who advised him to continue his studies, commending him to imitate the virtues of St. Exuperius of Toulouse and to follow the advice of Procule, then Bishop of Marseille.Thus Rusticus entered the monastery of St. Vincent of Lérins.He was ordained at Marseilles, and on October 3, 430 (or 427) was consecrated Bishop of Narbonne.