What is 'Dark Magic'?

[potioncat]

No: HPFGUIDX 95949

Jim wrote: 
> So I'm sticking with the notion that it's the state of mind of the
> caster that's the most important element in Dark Magic.  BTW, if you
> can find it, find the late Randall Garrett's Lord Darcy stories,
> mysteries set in an alternate history where magic works.  Garrett 
knew
> a great deal about literature about magic and the Laws of Magic and
> put it into his stories.  They're great reads anyway, and you'll 
find
> his ideas affecting yours, I bet.
> 


Potioncat:
You may have covered this in other posts, but are you saying that a 
curse could be cast by two different wizards, and would only be dark 
magic for one of them?..or that the state of mind makes it possible 
to cast dark magic?