home and garden. Around the age of twenty, Guérin asked for her mother's blessing to join a religious order, but Isabelle was still unable to cope with her loss and refused. Five years later, Isabelle recognized the depth of Anne-Thérèse's devotion to God and permitted her to leave home to join a convent. Entering religious life On 18 August 1823, Guérin entered the Sisters of Providence of Ruillé-sur-Loir congregation and was given the religious name of Sister Saint Théodore. She professed first vows 8 September 1825, and perpetual vows, which at the time were optional, on 5 September 1831. Sister Saint Théodore spent her early career as an educator, beginning as a teacher at Preuilly-sur-Claise in central France. In 1826, she began serving as a teacher and superior at the Saint Aubin parish school in Rennes before her transfer to a school at Soulaines in the Diocese of Angers. She also ministered to the needs of the area's sick and poor and received a medal for her teaching from the inspector for the Academy of Angers. While working in France, Sister Saint Théodore became seriously ill, most likely with smallpox. Although she recovered, the illness damaged her digestive system. As a result, Sister Saint Théodore could only eat a simple, bland diet for the rest of her life. Emigration from France to Indiana In 1839, the Most Reverend Simon William Gabriel Bruté, the first bishop of the vast Diocese of Vincennes in Indiana, sent Vicar General Célestine Guynemer de la Hailandière as a representative to their native France. Bishop Bruté searched for a religious congregation to come to the diocese to teach, provide spiritual instruction, and assist the sick. With only a few priests and a significant influx of Catholic immigrants of French, Irish, and German descent, the diocese needed additional help with its expanding ministry. Bishop Bruté knew the great assistance that a religious order could provide, having worked with Mother Elizabeth Ann Seton and her Sisters of Charity during the founding and early years of Mount Saint Mary's University in Emmitsburg, Maryland. In June 1829, while Hailandière was in France, Bishop Bruté died at Vincennes, Indiana; Hailandière, his successor, was consecrated a bishop of the diocese on 18 August 1829. One of Bishop Hailandière's first acts was to ask the Sisters of Providence of Ruillé-sur-Loir to send a group of sisters to establish a ministry in Vincennes. Mother