So if someone was miserable here, how can one change one's attitude? Perhaps we're destined to be either happy or miserable?
This is about to take this off the topic, I guess, but here I go:-
I don't think we're pre-destined for anything. I think in life we're given a proverbial plate of doo-dads and the Universe says, "Here ya go....now do something with it." Our lives are that which we make of them with what we are given. People can come from the same place with the same opportunities and yet end up with very different lives. It's all in what you make of it.
"But...!" I can hear someone yell...."I grew up with parents who beat me, and I married a man who was an alcoholic and I was mugged several times....etc. etc." and people will come up with a whole list of circumstances and situations that they feel have shaped their lives and thus define them.
"But...!" I would have to throw right back....do those situations define you or do you define them? What did you take away from the experience? What did you learn? How are you going to allow it to shape your views and your perceptions and how you live your life? Are you going to give up, give over, give in and say, "I can't, it's not worth it." or are you going to say, "This is what I've learned from that and this is how I'm going to let it shape my life." i.e., it's all in what you make of it.
People can change but first and foremost they have to WANT to change. Change takes introspection, soul searching, looking at one's self and admitting and accepting even the unpleasant stuff. I believe one has to be happy in one's self first and foremost. The rest is just geography. One can move all over the world, but your problems will still follow you. I learned this from experience. Heal yourself, love yourself and the rest will fall into place.
Just my thoughts.