"Why are there things that even though those are already gone and were already asked for forgiveness, still sting? still hurt?"
"Maybe those things really gave an impact that permanently scarred your heart that will never heal, and will just remain a scar forever. That everytime you'll remember those things or happenings, you'll end up crying and hurting even when those happened years or decades ago. Because you are scarred and everytime it hurts it becomes a fresh wound that can be a scar but won't heal. Ever."