Well it’s never permanent, but I would imagine someone in good health, with strong familial and social connections who lives above the poverty line (person A) is much more likely than someone without one or all of those things (person B) to have a stable feeling of happiness.
Stable, in this context, meaning harder to shake or break.
An example being person A is having a good day and they get a flat tire. The issue is much more likely to be resolved without affecting their overall happiness very much, whereas person B’s day might be ruined, which is more likely to have a knock-on effect that can greatly reduce overall happiness.
This is not to say someone without those things wont be happy, just citing a few top level things that, when absent, can make someones life experience more difficult.
As far as under what circumstances would someone experience stable happiness? That’s different for everyone because we all have unique challenges in life and how we were raised can directly influence where we are emotionally and what it will take to find happiness.
One of the most sure fire ways to find happiness is in kindness and forgiveness to others, as well as yourself.