How to Say "I'm Sorry"

"Larry" was one of the first guests Mark and I met. He is a middle-aged African American man, very large, and at first glance, fearsome. He hangs out at our corner, and gave us the scoop on where to eat in the neighborhood. He has been on the street for some time. Several years ago, while passed out on the street, he was awakened by a man pointing a gun at his chest. He managed to grab the man's hand and the gun was turned, went off, and killed the other guy. "Larry" was arrested, but the jury found him not guilty on the grounds of self-defense.
The people here at the Inn do not want the guests sleeping on the street, so have banned Larry from entering the Inn grounds until he finds other accommodations. This may seem cruel and not very Christlike, but it is very dangerous to sleep outside in our neighborhood,both because of the cold weather and the drug users that roam the area. So there is a "tough love" component to all of this.
Nevertheless, Larry hangs around and offers to help carry things for us. This morning he helped me carry all the cardboard and cans for recycling to the curb. When he entered the trash area, he told me that he knew he had been short with people the past week, but it was due to having a migraine headache. He wanted to apologize to me if he had been unkind. He said he was telling everyone he may have been short with the past week that he was sorry. He had seen a doctor and gotten some medicine, and now the headache was gone. He said it felt so good to have the pain leave him.
Six months ago if a man that looked like "Larry" had come up to me on the street, I would have looked away and probably hastened my pace. Not only was I having a conversation at 7 am with him, but HE was apologizing to ME for any perceived insult! What a lesson he was preaching about asking for forgiveness. Once again, those whom I was supposed to be helping were helping me.