He had killed many people but rarely he kills innocent people. His morality could not be said the kind of morality that is upright
But he has his own code of conduct. He punishes evil but it is not like he did not know mercy. However most of the time he is very merciless.
This time, he felt guilty and too many innocents had died because of his selfishness.
If this was in the past, he might not care that much. He would still do things, trying to rectify some wrong but he would never exert himself like this
But years had passed and he had changed a lot. He had seen and experience things. Experience all kinds of life, understanding people hearts and emotion, understanding his own heart and emotion and finding out the preciousness of life.
Life could be worthless and yet at the same time it could also be the most precious things. When you see someone life, understand it, you could see that there is beauty in it