Stoicism explores these ideas. One of the basic premises is that all external events are out of our control and to focus on what is, basically what is in our mind and our actions. Then we should try to discipline our ideas around virtues which are always good instead of outcomes and externals. That summary doesn't do it justice, if interested in exploring further. There are some good books on amazon or check out dailstoic for a quick overview.
https://dailystoic.com/what-is-stoicism-a-definition-3-stoic...
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