The principle for Day #26 on the 101-day book report says: "Resolve not to repeat past mistakes and send guilt out of your life, beginning now."
According to the Wikipedia, Catholic guilt is the idea that feelings of remorse, self-doubt, or personal conflict are created when an individual who is raised as a Catholic, engages in actions that the Church has declared sinful.
Since I was raised as a Catholic, I'll just come out right now and say that I am guilty of a lot of things. For instance, I remember going to Confession as a kid and making up sins because I didn't have any real ones to report.
And, thanks to concepts like Original Sin, I just got the feeling growing up that if I wasn't feeling guilty about something, I ought to have been feeling guilty about that.
But at some point along the way, I made a clean break and forgave myself. And as someone once said, "Forgiveness is giving up the possibility of a better past."