Gonxha’s religious formation was assisted by the vibrant Jesuit parish of the Sacred Heart in which she was very involved as a youth.
Subsequently moved to pursue missionary work, Gonxha left her home in September 1928 at the age of 18 to join the Institute of the Blessed Virgin Mary, known as the Sisters of Loreto, in Ireland. She received the name Sister Mary Teresa after St. Therese of Lisieux. In December of 1929, she departed for her first trip to India, arriving in Calcutta. After making her First Profession of Vows in May 1931, Sister Teresa was assigned to the Loreto Entally community in Calcutta and taught at St. Mary’s School for girls.
Sister Teresa made her Final Profession of Vows, On May 24, 1937, becoming, as she said, the “spouse of Jesus” for “all eternity.” From that time on she was called Mother Teresa.
She continued teaching at St. Mary’s and in 1944 became the school’s principal. Mother Teresa’s twenty years in Loreto were filled with profound happiness. Noted for her charity, unselfishness and courage, her capacity for hard work and a natural talent for organization, she lived out her consecration to Jesus, in the midst of her companions, with fidelity and joy.
It was on September 10, 1946 during a train ride from Calcutta to Darjeeling for her annual retreat,Mother Teresa received her “inspiration, her call within a call.” On that day, in a way she would never explain, Jesus’ thirst for love and for souls took hold of her heart and the desire to satiate His thirst became the driving force of her life.
By means of interior locutions and visions, Jesus revealed to her the desire of His heart for “victims of love” who would “radiate His love on souls.” “Come be My light,'”He begged her. “I cannot go alone.”
Jesus revealed His pain at the neglect of the poor, His sorrow at their ignorance of Him and His longing for their love. He asked Mother Teresa to establish a religious community, Missionaries of Charity, dedicated to the service of the poorest of the poor.
Nearly two years of testing and discernment passed before Mother Teresa received permission to begin. On August 17, 1948, she dressed for the first time in a white, blue-bordered sari and passed through the gates of her beloved Loreto convent to enter the world of the poor.