Regret
I have a revelation today. I realized that "regret" is such a wasteful, useless feeling - a total self indulgent energy. So you want to do something...but you did not take action so you miss the "opportunity" . Big deal. What's the point of beating yourself up years after the fact? Life goes on! Stop being a prisoner of that lost moment because you fail to take action. Move on...
For some reason, beyond my comprehension, the popular songs that I grew up with and the popular sentiment around that time in HK were all about "Regret" . Now that I have some healthy distance from that time, I can see how much "Regret" is an oveblown, over glorified wasteful nothing which prevent fresh, new, magical moments entering your life because you are so imprisoned by the past. Stop... life is about enjoying every second of every moment of one's life so we can be open to fresh and new experience - that is true living!
I vote for leaving regret behind because it is a great excuse for people who have no courage to allow any mistakes in their lives. But you know what, mistakes happen whether you like it or not... so if it does, cop to the fact that there is imperfection in life and imperfection in you. It's a part of life - move on. Don't dwell and get stuck because you have to allow yourself a second chance. You know from this experience that you wlll be able to do better next time. Let's leave that wasteful useless self beating "Regret" behind and turn that into a celebration of "change" . We have to be our own best friend because we can be whatever we want to be!