Among the greatest of personal human foibles is the act of thinking too much. A young person might overthink the future. With age comes overthinking the past as well as the time to do it.
Everyone’s past includes moments of triumph and moments of grief, surrounded by long periods of mediocracy. Everyone’s the same in that regard – differences in personality create a predisposition to dwelling on one or the other.
I find the more I create and the happier I am with my work the less I dwell on anything at all. It was just someone else’s life. All the mistakes I made, and there were a boatload, and whatever I managed to accomplish are wrapped up and put away – they matter not all anymore. The act of creation has placed a final coda on previous lives. Someone new exists in its place. I did something wrong once, well gee, sorry about that; it doesn’t matter anymore. See who I am now.
All my life I have had to learn to do things differently. To see the world differently.