I think this falls under.
Accepting the things we cannot change.
Changing the things we can.
And the wisdom to know the difference.
You can use that past to help you stay sober, because I don't think any of us want to go back what we were like.
Someone else on this forum (sorry don't remember who) put it this way.
If you get caught up in the past, or are worrying about tomorrow. You are pissing on today.
Fred