It amazes me how pride gets in the way of certain individual's mindsets. I'm quite a forgiving person, and it's mind blowing to know that all it would take for certain circumstances to be changed - ends with one word 'sorry.' Being a simple-minded being, that's all it really takes for me to put differences aside and grudges to rest. That one word goes a long way. It definitely shows me that you are aware of your mistakes, and that your pride means less than my existence. Apologizing isn't such a difficult task, esppecially since those in the wrong - fail to use it. These beings would rather avoid the entire ordeal and situation, than set things right and stable with one simple word.
Words make a difference, even just one. The difficulty of the use of one word is surprising, because just one word could nearly solve an issue, yet I hardly hear it. Pride, status, humiliation all factor in with such simple situations - why spend the rest of your life being angry only due to the fact that another is angry at you?
Grudges aren't created out of the blue, they're created on the selfishness of our behaviors.
If you're wrong, simply apologize.