In 1928, when she was only eighteen, Gonxha Agnes Bojaxhiu joined the Sisters of Loreto, an Irish community of nuns with missions in India. From 1931 to 1948, Mother Teresa taught in Calcutta, but the suffering and poverty she glimpsed outside the convent made such a deep impression on her that in 1948 she received permission from her superiors to leave the convent school and devote herself to working in the slums of Calcutta. In October 1950, she...