Most of us are probably familiar with that Prachettism. And it allways raises a wry smile when I read that phrase-Followed by the Character doing exactly as he/she pleases.
Theres the 3Fold law of Witchcraft which under close scrutiny dosen't stand up to any sort of Logical Examination. Theres this whole endless arguing over Black/White Magic-People using the Rules to justify their behavior or to condemm others.
Thing is I'm of the opinion that Magic and Ritual is too caught up in the Rules and Laws of the Art and not enough in the results.
I've counted on my bookshelf and between me and OM there are 20 books of Magic, some of which I refer to on a regular baisis some of which I havent opend for ages. Now most of these books have one thing in common, They were written by someone who had practiced the spells/rituals and gotten some results. Those books are not so far removed from the Magical Diary that every good Witch and Magician is supposed to Keep. (Yes I have one, you can read it after i'm dead cos it details some pretty honest stuff) Those Books from Crowley to West are nothing more than Accounts of their own Experments and results.
We need those books as a grounding, as a way of understaning what has been achived through that certain persons style of Magic. And as away of learing what is Possible and what isnt. Or maybe a way of Learing what they managed to achive and what they didn't.
We refer to the books for reassurance for the "Am I doing this right?" which pops up every so often as we evolve in our art.
Questioning what we are doing, How we are doing is a part of our Art, Every so often we get out the yardstick to measure ourselves. And hopefully to see the areas in whch we can improve.
Magic like ourselves is allways evolving, Its not Static, Witchraft didn't stop in the 50's when Garnder published his work, or in the 80's when Saunders popped his clogs. CM didn't reach its pinaccle in 1947 when Crowley died (although there are many who try and keep it set in that era and mindset.) Talking about Lessons learned, Crowley died a heroin addict and virtually destitute-Hasn't stopped people trying to emulate him for the past 60 years.
We do require some rules and truisms, and then we require the self belife to break those rules
Otherwise Magic is just part of the Publishing Buisness and Pagansim is a fancy dress club.
