Patron with Honors
They may have to exist for the 'magick' to work..
Yes, within some schools of thought, that would be valid, but it has nothing to do with magick.... or maybe everything, depending on which view of magick you have. To me affirmations are just a very effective way to focus your intent, no claims of magick necessary. Destroy the document and destroy whatever it contributed to the effort to focus your intent. Read the link I posted earlier to get a better sense of how it is intended to work.
Nothing very "magical" in the process and it may even resonate at a few rare moments with a vaguely Scientological flavor.
Certainly, if I had gone to that trouble to produce formalized written affirmations, I would have kept them locked away tight!
But I'm not Hubbard and it is a real dicey thing trying to get any certainty on what he believed for himself and exactly when he believed what.