Excellent article John.I'm sure Bob will come up with an invaluable critique of the piece, but apart from one or two minor points, I think I agree with your argument
It all comes down to the old good vs evil dichotomy [or Law vs Chaos as I prefer. The Cosmic Balance, read some Michael Moorcock] ...you may want to help, but as soon as you use your enemies tools, you are no better than them.
Read just about any well thought out fantasy novel, which is more than mere *sword and sorcery* and you will find a discussion of the moral and ethical shortcomings of magic use.
Take LotR..Gandalf is very sparing of his *big* magics, and does'nt use them unless absolutely neccessary...remember him recoiling in horror when Frodo offered him the Ring. Boromir wanted the Ring as an instrument to bring down evil, not understanding that it would be his undoing, regardless of how pure his motives are.
In a nutshell my understanding of the Willow situation is that she is unable to see how tapping into the 'dark mo-jo' [D'land S3]will ultimately corrupt her, regardless of her purity of mind.
Giles went there too, but had the strength [because he was a watcher in waiting?] to retreat, treat magic with respect and only resort to it when there was no alternative [Primeaval,The Gift]
Tara's magic is that which is enshrined in the 'good' [Law] side of the Cosmic Balance, tapping into those magics which are all around us, if we only know where to look, and have the skills, confidence and inner strength to conseve and use them wisely.
Again, I say, there is a lot more to Tara than we're led to believe. She is going to surprise us all someday
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love and kisses
Still Waters Run Deep
*Hands! Hands in new places!*