The stability is just about living a quiet lifestyle without problem of what to eat or what to drink. Financial stability is when we don't complain like other people of how to live a better life. People are really suffering and this had made their financial stability to be lower than normal. There are people who are financially sufficient and can do whatever they like to do because they have the funds to handle their problem. Everyone aspires to be independent and go for what they are interested in.
You're right, having financial stability is all about the right state of the mind being tuned towards a positive attitude of realizing such is possible to get, then another thing is being contended with what you have and not being decieved by anyone else including yourself, financial stability comes with alot of demands to maintain having this continually, because we can not profess positive today and later turned to the other side because we are no longer capable of, stability in finance depends on our minds stability first.