Leave Room To Learn
"The wise person knows that his wisdom is limited, but the fool thinks he knows everything."
Many people get upset when they discover they made a mistake or realize they do not know as much as they thought they did. This is often based on a person telling himself (albeit not with total awareness) that he already "knows everything." Hence he finds it painful to admit he does not know as much as he thought he did.
A wise man realizes he does not know everything and has pleasure in the quest for new knowledge.