Usually it's easy to just let things go and hold no grudges. I can get pissed off with some project group mates for a while, try to think from their perspective, then eventually let things be and accept the way they are.
There is however this one very thing that never seem to get out of me. Sometimes I think I have already forgiven; sometimes I recall the resentment, refreshed.
To forgive and forget. That's easier said than done.
My dad is sitting right in front of me solving a sudoku puzzle. Out of the blue. In the middle of the night.