Hmm, I think there's a difference between being able to control your actions and reactions and---well, emotions don't behave rationally and aren't subject to self-control in that sense at all. You feel what you feel, and that's about it. Just because you have a feeling, though, doesn't mean you have to react to it, and your actions and reactions are subject to self-control. I suppose you can "cut off" the experience of feelings by consciously redirecting your concentration and attention to something else for a period of time, at least until you find yourself in a safe place to release, but it doesn't change what they are or why you feel them. Eventually, in some form or another, you just have to go through them. So when you have something that increases the power of your negative emotions, that means you feel more grief, more resentment, more envy, more rage ... so you have to find more ways to safely release that. At the end of his first life, I think we see WWX breaking down, slowly losing his sanity, sinking under the weight of his grief, resentment and wrath. I think he had a lot of grace, though, unlike the men in the LanlingJin sect, and that saved him. He wasn't really a true black magician because he wasn't selfish. He wasn't doing all this stuff for his own ego, no matter how much others accused him of that.
Somehow I interested in Wei Wuxian's power In the novel.He can bring back people dead(but must have a like strong resentment ?not very sure)and it seems like he can show the past of the dead people during he was at the temple(that has the statue of the enemy's face?I forgot).He kinda great at dark spell but has a great consequences especially it can enhance dark emotion within himself.I just wonder how far can his dark spell can be use if he can control his emotion.Anyway I love this story so muchh .I want more the extraaa uwahhΣ( ￣□￣||)(In the novel i mean)