I had a day in which I had made a decision and behaved in a way I regretted.
To my surprise, I woke up on that day again. The same events started happening; I was already feeling shame, but the events felt inevitable. Suddenly I realized, "You can make a different choice." Even though the bad decision had already begun, I switched midway (leaving some very confused people) and made a different, healthier choice. The next day, I was full of wonder and I wanted to tell everyone, "I re-lived a day!", but I knew they weren't likely to believe me.
Lately, I have been working on changing some long engrained patterns of thinking and feeling, so the message was powerful to me: we do have the power to make a different choice.