She was riding in a train from Calcutta to the Himalayan foothills when she said Christ spoke to her and told her to abandon teaching to work in the slums of Calcutta aiding the city's poorest and sickest people.
Mother Teresa was born in 1910, in Skopje, Macedonia, she taught in India for 17 years and in 1946 she experienced "call within a call" to devote herself to caring for the sick and poor.
Mother Teresa learned to speak both Bengali and Hindi fluently as she taught geography and history and dedicated herself to alleviating the girls' poverty through education.
In 1985, Mother Teresa returned to New York and spoke at the 40th anniversary of the United Nations General Assembly. While there, she also opened Gift of Love, a home to care for those infected with HIV/AIDS.
On December 17, 2015, Pope Francis issued a decree that recognized a second miracle attributed to Mother Teresa, clearing the way for her to be canonized as a saint in 2016.