My father is in failing health and financial ruin, living with a woman who is bipolar, and refuses my help. What can I do?

Absolutely perfect advice in how to get along with a Bipolar personality. And sensitivity is shown to one who suffers from this condition, if the lady indeed does have it. Even if she doesn't, and is just a "difficult" person, the same advice would apply. Many aspects of the article, such as the father being happier than the daughter thinks he is, etc. is right on! This was a very good and insightful answer.