"placing her at the side of the greatest mystics of Christianity"
My faith and common sense tells me different. She and the other saints were not mystics...they were servants of the living God, despite their weaknesses, and inspite of them, with His help and guidance.
What is your definition of a mystic? How do you know she was NOT a mystic?
In the life of Moses, the BURNING BUSH was a MYSTIC event (as well as some of the "magic" he performed in Egypt).
For Mother Teresa, she had the initial apparition from Heaven that ordered her to form the Missionaries of Charity.
Then there is the MYSTIC EVENT of the ceasing of fighting in Beirut, Lebanon, in 1982.
In the latter event, Mother Teresa tried to get a cease fire by talking to people so that she might save some retarded Muslim children.
She was told that nobody could order a cease fire. At that point, she went and prayed in the next room and said that there would be a CEASE FIRE at 6am the next day, and that she needed to have vehicles ready to cross into the Muslim side.
The cease fire did occur at 6 am, and only heaven knows why it happened...