Good and evil.

It's not the heart telling him to seek revenge. Not at all. It's that notorious egoism, that part of the soul that everyone has, and it's far from being the best part. But you can't argue that you can do without it. We're just different people. My reason tells me to do everything for myself, not my heart. I don't live by impulses; I just didn't express myself well. I live with my soul. It's not very pure... well, to be honest, I don't really want to deal with such a mess. But it's precisely this that tells me how to live better without causing pain to anyone... sorry for the rambling, I've never been good at expressing what I feel in words.

I don't approve of revenge, but I don't see egoism in the desire to get revenge. Someone killed his mother, and he knows exactly who did it. The man loved his mother more than anyone else. Moreover, this woman was a doctor, not just any doctor, but a surgeon, and every day she saved people's lives. The man is consumed by rage, hatred for the killer, who not only deprived him of his mother but also many other people who needed the help of a wonderful doctor. After such a vile act, this killer has no right to exist; he MUST die! He must die for the deaths that are happening in hospitals because of him! After all, in the whole city, only his mother was capable of performing heart surgeries! Why did he do it? WHY!? Killer!!! I hate him!!! I will find him!!! I will make him pay tenfold for my mother's blood!!!

That's how a vengeful person is born. If we talk in general terms...