Did mother Theresa have Final Revelation?

I only read the TIME article-about how her letters confided in her loss of certainty (about the presence of God). So, did she struggle with this to the end? or did she have some final revelation?
I recall seeing an interview with a Benedictine monk-this man had been a monk for 24 years. When interviewed, he stated that he had had no garnd revelations. Is this true faith? persisting in an endeavor, with no message from the allmighty?