The most important thing is not to think very much about oneself. To investigate candidly the charge; but not fussily, not very anxiously. On no account to retaliate by going to the other extreme -- thinking too much.
It is important to direct our intelligence with good intentions. Without intelligence, we cannot accomplish very much. Without good intentions, the way we exercise of our intelligence may have destructive results.
If you're serious, you really understand that it's important that you laugh as much as possible and admit that you're the funniest person you ever met. You have to laugh. Admit that you're funny. Otherwise, you die in solemnity.