Is there anything more harsh than realizing the wrongs we have, purposely or accidentally, inflicted on others over the course of our lives? I have been cruel, thoughtless, and rude in my life. Those are facts. But does that make us who we are? No. 

A person is not defined by a single action or thought; rather, an individual should be defined by the body of their works and deeds. There are people lost in the world because they have judged themselves as not worthy for something done. Seek them out, let them know that full lungs and a voice give you a chance to fix whatever was done.