And in turn, new ones follow. It's better to perfectly understand ones weaknesses and then apply that knowledge to limit them or even turn them to ones advantage. A friend of mine has a terrible temper. Just to even scratch him in battle will drive him into an uncontrollable rage. But he can easily use this flaw to increase his conviction not to receive any damage in combat, and through practice he has learnt to channel his rage to devastating effect. If he merely tried to control his temper, he would suffer undue mental pressure or be unable to properly utilise his strength.