Thank you. Did someone publish her letters or diary? Where are you getitng this from?
Here, from 2007...
http://www.time.com/time/world/article/0,8599,1655415,00.html
“A new, innocuously titled book, Mother Teresa: Come Be My Light (Doubleday), consisting primarily of correspondence between Teresa and her confessors and superiors over a period of 66 years, provides the spiritual counterpoint to a life known mostly through its works. The letters, many of them preserved against her wishes (she had requested that they be destroyed but was overruled by her church), reveal that for the last nearly half-century of her life she felt no presence of God whatsoever — or, as the book’s compiler and editor, the Rev. Brian Kolodiejchuk, writes, “neither in her heart or in the eucharist.”
“The book is hardly the work of some antireligious investigative reporter who Dumpster-dived for Teresa’s correspondence. Kolodiejchuk, a senior Missionaries of Charity member, is her postulator, responsible for petitioning for her sainthood and collecting the supporting materials. (Thus far she has been beatified; the next step is canonization.) The letters in the book were gathered as part of that process...”