[NhanH]

"Good", "evil" and "good faith" are all too ill-defined to be used in a philosophical discussion like this: you will have to define them. It's fine for pg to used, because a) He's almost using good as the opposite of mean, and b) He's not discussing about morality. When it comes to morality discussion, a lot more bets are off and you have to be careful on what basis you're defining "good", "evil" and the like.

To be more on point, there are a lot of "evil" people that are acting on good faith - the comical image of an evil genius who's hell bent on taking over the world for his own greediness or for fun doesn't really exist in real life. You can truly believe that the best way to win a war for your country (and help your fellow country men) is to exterminate the other country, so you make an order to massacre everything that move. That would be evil acting in good faith.