"In each case, your loved ones have been used to lure you into Kronos' traps. Your fatal flaw is personal loyalty, Percy. You do not know when it is time to cut your losses. To save a friend, you would sacrifice the world. In a hero of the prophecy, that is very, very dangerous."
I balled my fists. "That's not a flaw. Just because I want to help my friends—"
"The most dangerous flaws are those which are good in moderation," she said. "Evil is easy to fight. Lack of wisdom… that is very hard indeed."