maryz - I'm not sure what you were laughing at. I think it was the word "egotism" or "egotistical" that set you off. I apologize for using the wrong word. But Mother Teresa's problem is very complex, and I'm not a psychologist or a theologian - just someone trying to understand her spiritual problem.
No kidding! I'm sorry -- that's funny. I believe it's considered utterly unprofessional for even trained psychologists to "diagnose" someone they never met. Only the grandstanders who no longer want the respect of their colleagues do it, and then on TV or for the trade book market, hoping to make a bundle.
Have you even read all her writings -- not just the snippets from the diaries not yet published? Do you know anything about how and why she started her work in Calcutta? Have you even read Malcolm Muggeridge's Something Beautiful for God? Do you know anything about mysticism?
You think you have "diagnosed" a "spiritual problem" in Mother Teresa, and you're looking for causes. I think inductive reasoning would be far more appropriate here.