Kingyo
This is Kawaguchi Hidetoshi. This is my humble answer to the question.
I was able to take a look at how worried you are about regrets about things in the past.
We are troubled and tormented when we inevitably cause various kinds of attachment to the past. I still haven't been able to completely get rid of my humble life.
Also, in a sense, being caught up in the past is unavoidable. This is because my past and present self are connected, and of course there is an inseparable relationship.
However, since things from the past have already passed, there is nothing I can do about it anymore, and my past self is just my past self, not my current self. My present self is the only person I remember about the past, and the self that imagines the future is only my current self.
From here on, it becomes a bit of a difficult way of thinking, but I think that my past and present self are “not the same,” and “not the same, they are not different,” and they are simply continuous beings according to auspicious circumstances (causal relationships, etc.), and in any case, I think that what can be said to exist is only an instantaneous moment in this continuity. This has also been addressed in the following question as an “unequal theory of time.”
Question “Tips for living only the present moment strongly”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/1002967103.html
I think it would be nice if you could understand the above little by little from now on, and realize, “Oh, my existence is nothing more than a series of moments of the present moment by moment,” and if the past is in the past and there is something to be regretted, ashamed, or reflected on, then just adjust it so that it can be utilized as much as possible, towards good future results, and anyway, in this “present”, make an effort to adjust good causes (causes and conditions) I'm wondering if there aren't any.
I pray for good deeds.
Kawaguchi Hidetoshi Gassho