So im looking for 1 word preferably that sums up this ideology. So i believe that bad things that happen to you are not necessarily bad, infact using the ying yang theory or you cant have ups without downs and vice versa. For example being grateful that you grew up poor because you will appreciate your riches when you get them, or in extreme cases close deaths even your parents can be good because it can make you a stronger individual and more motivsted to succeed for them.
May not be what you're looking, but was the first thing that popped into my head.
From the TED speech by Daniel Gilbert:
Natural happiness is what we get when we get what we wanted, and synthetic happiness is what we make when we don't get what we wanted.
It is about accepting what you have been given, without choice, and being happy for what you do have. When you come to conclusion that you cannot change the past you synthesize happiness.
When having the belief that you can choose to change the situation or reverse bad events it becomes a roadblock to synthesizing happiness.