The belief in the legitimacy of cursing has been around for thousands of years. For those who know about Spiral Dynamics, the idea of cursing originates at 🟣.
Let's look at the beliefs that make up the belief:
'I did a bad thing.'
I = belief in seprate self
did = belief in free will, and past / future
a thing = belief in separate events (due to the beliefs above)
bad = belief in objective morality
Forgiving ourself through understanding the situation entirely, plus a general attitude of gratitude, is a good remedy for guilt.