I would add to that the fact that some people are even able to get past pretty amazing difficulties and still manage to be happy. So maybe even these "sources

I would add to that the fact that some people are even able to get past pretty amazing difficulties and still manage to be happy. So maybe even these "sources of unhappiness" are not fixed. I mean, check out this happy guy: https://en.wikipedia.org/wiki/Nick_Vujicic#:~:text=Nicholas%20James%20Vujicic%20(%2F%CB%88v,absence%20of%20arms%20and%20legs https://en.wikipedia.org/wiki/Nick_Vujicic#:~:text=Nicholas%....