Good! You choose the light side and not the dark side. The fact that your opponent is evil, doesn't mean that you should be too, isn't it? Onto the next situation. You are fighting an evil Sith Lord. He is very strong. You are not sure that you are going to survive the fight! You feel the hatred for this Sith Lord flowing through you, and it makes you stronger! What would you do?   I would take a deep breath and try to become calm again, even if that means loosing speed and energy I would use my feelings of hatred and anger to kill the evil Sith Lord. I can become calm again afterwards. And at least this evil Sith Lord would be dead, which is a good thing!