Let's be honest: we've all done things we regret.
They may have been when we were kids or adults. They may have affected just ourselves or many people around us. But it's likely we remember doing them because we regret them.
This is something that's not easy to talk about.
But there's something really valuable in recognizing the parts of ourselves that are capable of doing things we regret.
I recently met a woman who gave a TED talk (and has now written a book) about this exact topic.