It is a sign of arrogance to be mad at someone for not acting as per your advice, especially if it was unsolicited.

We are not as important to most people as we are to ourselves. As a matter of fact, we are—to most people—not important at all.

Being divorced does not necessarily make one’s advice on marriage useless … or useful.

An ignorant man who is regarded as knowledgeable by people who are more ignorant than him is still ignorant.

An arrogant man whose arrogance we see from his own behaviour is more tolerable than a humble man whose humility we hear of from his own mouth.

You can only manage to convince a person to admit to being wrong, not ignorant, arrogant, or stupid.