I just don't know

Why is it so hard for some people to either accept, or admit that they are wrong? I remember a time when swallowing my pride to do either was like strapping me to an electric chair to be executed. But after growing up just a little I've found that life is better when I hold myself accountable for my actions and my behavior. I do have people around that hold me accountable, but I find it much easier to be completely honest with and to police myself from within listening to my own heart and conscience. Whether it's weight loss, bad/questionable behavior, or just NOT doing the right thing when I should. There are some people that I just shake my head when I encounter them because they will flit through life like everything is okay, and in fact it's just the opposite. Rather than dwelling on it I will continue to work on keeping myself in check and doing what needs to be done because I don't want to look back on my life and regret anything that is within my control.