Sorry, this may sound like a silly question but I couldn't come up with a reasonable answer myself ... Does an evil spirit really know what "evil" is? If yes, where did it get that knowledge without experiencing the knowledge of good and evil?
I would think it is only through the experience of this life that we can understand what good and evil are. As far as that goes, Satan, himself really doesn't understand good and evil, then, right?
Maybe they do evil things without understanding what they are doing and therefore do not have a knowledge of good and evil but are still the same, evil. It is hard to understand how an "evil spirit" knows to influence evil without understanding the difference between good and evil. Could it inadvertently influence good, without knowing the difference, without having a specific motive? Does the "evil spirit" really have evil as its goal or is it just 'being himself'?