Voldemort wrote:On page 810, Harry is consumed with rage, and attempts to preform the Cruciatus Curse on Bellatrix, and is unable to. I have a few questions regarding this. First, Bella tells Harry that "you have to mean them, Potter. you need to really want to cause pain-to enjoy it-righteous anger wont hurt me for long"
Wasnt Harry angry enough, i mean that his godfather just died, so why wasnt he able to do it. maybe just because he has never done it before? and why wouldnt harry try and kill her instead of just torture? he had the chance, had he done the crucio correct she would have been in pain, so why not just kill her?
so do you think that Harry would have been in trouble with MoM if he would have correctly performed it? does performing it on a DE make it okay?
and last, do you think that Harry should/will learn how to do the UC? i think that it is necessary to learn the killing curse, so that he can defeat a DE if he needs to. obviously he will not be taught how to at school, but if i were him a would learn it on my own.
sorry for the long post, but what are your thoughts?
I have lots of thoughts on this (glad you started this topic!

), but as I don't have a lot of time, I think I'll (for now) add another thought for people to ponder . . .
If you have to 'mean it' to perform an unforgivable curse and have enough hate, evil, and power in you to do it (which would explain why Harry couldn't...he had 'righteous anger', as Bellatrix said, but not true, deep-seated anger, hate, and evil), how do you explain Pettigrew performing (with Voldemort's wand) 'Avada Kedavra' on Cedric Diggory in book 4? Pettigrew wasn't supposed to be a good wizard in school (yet he did kill several people when framing Sirius), and even if he did improve somehow, how did he do AK with another wizard's wand?
By Bellatrix's definition, I didn't think Pettigrew could do it...he seems to fear Voldemort than truly worship him (like Bellatrix, for instance)...moreover, he seems to be with Voldemort out of fear and weakness. Bearing all this in mind, it makes it interesting to remember that Dumbledore reminded Harry once that having Pettigrew indebted to him (Harry) would prove valuable later on...Harry was disgusted by this, but if Pettigrew truly is powerful and truly 'owes' Harry his life from book 3, I wonder how JKR will weave that into future books...any thoughts?
~ Lizzy
