She had complete faith in Catholic dogmas, but had lost her faith in a god. She had to force herself to believe that god existed, because that's what her dogmas dictated to her was necessary. If she didn't believe in the supposed god, she was certain she would burn in hell.<quoted text>
Um, Mother Teresa isn't noted for a lack of faith.
That is not a healthy reason to keep one's faith. Not even close.
She was determined that the god HAD to exist for her own salvation.