I have acted out inappropriately so many times and I believe I felt bad after each episode. Regret, guilt, the gamut of emotions one would expect. As I grew older I thought I would become better at harnessing that behavior and I have. However, I still act out occasionally and it's equally as difficult to fully understand exactly why I do it. I end up apologizing if I hurt or offended anyone, and generally feeling crappy about myself afterward regardless.

The only answer I can really think of is forgiveness. Of course, forgiving oneself is not easy for most of us. In fact, it's much easier for me to forgive others. But you really have to learn to do it and also learn from each episode.