“My God, my God, why have You forsaken me?” Mk 15:34
The servant is not greater than the Master. The feeling of the absence of God is not uncommon–our experience and many spiritual writers attest to this. There are always tests of our faith, just as most people fear death, even devout persons.
Reporters (I believe Anderson Cooper also did a segment on this story on 360) love shock and awe to bring in ratings, but revelations about any faith tests Mother Teresa may have faced should not surprise us.
Mother Teresa was human like the rest of us. If she had crises of faith, of course atheists will rejoice, thinking that she came to feel that God does not exist. If Mother Teresa had never doubted, atheists would have said that she had lived a delusion.
Belief and disbelief are both influenced by mind and emotion, but in the last analysis, belief is a matter of Faith. However, I believe as Norman Geisler and Frank Turek explore in their book, I Don’t Have Enough Faith to Be an Atheist, that it takes more faith to be an atheist than to be a theist.