In 1577, his father took Luigi and his brother to Florence to study and improve their Latin and Italian. As it would happen, the young man would develop an affinity for study of the saints even more than his regular studies. In 1579, The father moved the brothers into the court of the Duke of Mantua. There the Saint decided to abjure his claim to his father;s title and place, passing it to his brother Ridolpho. The Saint then suffered a malady that allowed him to stay out of the public eye, withdrawn in prayer and study of the Saints. At this time Aloysius read of the Jesuit missionaries in India, and he resolved to join the Society of Jesus. He began this direction in life by instructing the boys of Castiglione in the catechism. At Casale-Monferat, where he spent winters, he assumed the discipline of a monk, fasting three days a week, scourging himself, and praying at midnight on the stone floor of his unheated room.
Over the next two years, Aloysius would fight with his father, mother, regals and delegates over his impending Jesuit vocation. They disagreed with it adamently on the grounds he should follow in his fathers stead. Finally, they relented after most of the family title and responsibilities fell to his younger brother Ridolpho, thus allowing Aloysius to enter his novitiate in November, 1585.
In the third year of study, he came to the revelation he would not live long. The plague struck in 1591, and he was sent to aid the ill in the Jesuit hospital of Rome. He performed the lowliest of duties, but contracted the disease in time. He was sure this was the cause of his eventual demise, and once asked his confessor, St. Rober Bellarmine, if it was poosible to avoid Purgatory after death. St. Robert assured it was possible, and Aloysius aspired to this end. Aloysius' health was so poor that he received Holy Viaticum and Extreme Unction on several occasions. It was revealed to him that he would pass on the Octave of Corpus Christi, and though he appeared much better in the days preceeding the Feast, Saint Aloysius Gonzaga did in fact turn and die on the Octave of Corpus Christi, June 21st, 1591. Saint Aloysius Gonzaga is the Patron of Catholic youth.