Mother Teresa, put on the fast-track to sainthood by the Pope after her death five years ago, was tormented by a crisis of belief for 50 years, her writings reveal.
Her letters and diaries present a completely different picture of the nun and Nobel peace laureate from her public image as a woman confident of her faith.
It is being said in Rome that biographies will have to be rewritten to take the revelation into account.
The previously unpublished material is to be brought out as a volume in Italy. It was collected by Roman Catholic authorities in Calcutta after her death, aged 87.
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