Well first I would say that there is an external and internal arrogance - one that makes you seem arrogant to others, and one that is just your private thoughts

Well first I would say that there is an external and internal arrogance - one that makes you seem arrogant to others, and one that is just your private thoughts. The first is sometimes bad depending on who you're talking to, and the second is ok since it's just your thoughts. The most important thing to remember is the Golden Rule - treat others as you would wish to be treated in their situation. If being arrogant breaks this rule, then don't do it.