First off, they paid money and went through a lot of drunken me explaining the mysteries of the spheres in ways that only a drunken magus can convey. They have become friends and understand each others' issues. They are basically a coven of awesome planetary magicians. And introducing people to that who weren't there isn't fair to them, and taints the work.
I expect you to have bought one of my books, so there's no charge for this exercise. If you haven't, buy it here:
Seven Spheres Book Orders
* Note, this isn't "safe" and some people had terrible things happen to them immediately after, but then things got a lot better for most people still capable of posting to facebook. It's not like we ACTUALLY UNDERSTAND how magic works, ffs.