One of the major problems with not being able to let go of past transgressions is that you do not allow yourself to grow, it becomes a state of Arrested Development where nothing comes or goes. Sadly this has power to separate families, friends & neighbors from the fabric of unity. Forgiving oneself transgressions against others so you can then forgive others is a good start. Only then can you truly begin to grow into the person your suppose to be & begin to live as freely as possible.