People always know what their mistakes are. But the ego takes control and stop them from apologising for their mistakes. The heart will try to remain calm but it's just a fake screen put on the front. They just don't want to admit their mistakes. They just want to keep going the way they like.
On the other hand, the person who has been putting up with the hurt. They are sometimes like the victims who are afraid to speak. They believe being patient will solve everything. They believe that trying to understand the person they love and putting up with their temperament even when they are hurt would save their relationship. But they don't realise it's wrong.