This is a reply to the claim that I am overrating Diana's commitment to her charity work.
"Nothing gives me greater happiness than trying to help the weakest in this society. It's a goal and, from now on, an essential part of my life. It's a sort of destiny."
When I read these words, actually I more focus on the phase "from now on" and "It's a sort of destiny".
It is not about commitment. Looking for happiness is human being's basic surviving instinct. Usually a person's greatest happiness are from two places -- family life and work. She said "it was a sort of destiny". Whenever she said "destiny", it gives me the feeling that it was not up to her, but her fate. If she believed that she couldn't get the happiness from her family life, then where can she find her happiness? It can only be her work. And she always considered her work was to make people happy, especially the poorest one. No, it is not about commitment, she was just trying to make the best out of what she could have.
And "from now on" ("now" = the summer of 1997), means the belief that she should look for the greatest happiness from her work was not always there, but only come into her mind not long before, which I think indicated that before that summer she still believed she could get the greatest happiness from a marriage, but she gave up now.
That explain why she broke up with Hasnat Khan around that time. She finally believed that a marriage between them was impossible. So seeking the greatest happiness from her work is a second choice after all those "hopes" of her personal life were extinguished. By "hopes" I mean (1) marriage with Hasnat Khan, (2) her "those wishful hopes" for Charles. On July 17, 1997, Charles throwed a big party to celebrate Camilla's coming to 50th age at Highgrove. It was a big blow to her, according to her friend. She talked to her friend "she felt all the darkness in her childhold has come back" and "felt being abandoned again". I think after the divorce, she kept a good relationship with Charles. Very likely she still had some little hopes for Charles. Otherwise she wouldn't have felt so hurt. No hope, no disappointment, right?!
I kind of think she had said those "nothing bring me..." words to herself many times before saying them in that interview. Leaving two men you really love, and going into a relationship (marriage) with a man you don't have too much feeling is not an easy decision. I imagine she'd have been persuading herself many times like "Diana, don't worry too much, you can still get your happiness from your work. You don't have any other choice. It is your destiny." (The reason I said two men here is, her marriage with dodi is equivalent to a marriage gate ticket to Charles and Camilla, that means Charles would leave her ultimately.)
But once she made up her mind, she would carry it through. She was always like that. That explains why merely a hospice plan was enough to buy her -- that is the only place she could seek real happiness, her personal life was too disappointing.