"Good" is the opposite of "Evil". That's how I see it. There is not necessarily balance; otherwise, why would Druids exist? However, there is opposition, conflict, and the attempt to balance. Both Good and Evil exist naturally, and one relies on the other to exist at all. In my opinion, there is no clear definition. To quote Kevin Spacey in K-Pax: "Every being in the universe knows right from wrong." Therefore, isn't Good the action taken against Wrong, and Evil the action taken against Right?