I don’t think I’ll ever be able to understand why a person can’t admit to their own faults and why a...

I don’t think I’ll ever be able to understand why a person can’t admit to their own faults and why a person can truly think they can do no wrong. what kind of mentality is that and how does someone pick up that mindset? how can a person go through life blaming everyone but themselves? how can someone truly think that they are prone to making mistakes? is that growing or is that shrinking? I think I’m trying to understand something that has no real answer or motive. but if there was an answer, I am always open to explaination.