I have done terrible terrible things in my life
Wow, what kinds of bad things?
I've killed people, I've robbed stores, I've done many bad things
You shouldn't kill people or rob stores. If you know that these things are bad then you shouldn't be going out of you way to do them. You should be looking to be a good person and do good things to those around you.
You are being hypocritical.
I haven't done those kinds of things. You should not accuse people of the things you have done. Are you still engaged with  these kinds of things?