While working to activate Kundalini, I wonder what would have happened had I possessed only the Cleary version of The SGF. Perhaps I could have figured it out, but for me the Wilhelm was like a manual, albeit not the most instructive manual, but perhaps the most poetic. Manuals are difficult to write. Why? Most writers don't take the proper perspective.
I used to be a Technical Writer. Above all, I tried to put myself in the user's place, asking myself at each stage of the user experience: What does the user need to know at this point? To get from A to B? From B to C? Inevitably, it was not more background, but hands-on info for getting the job done. Does that mean that NO background should be provided? NO, but the tech writer's first responsibility is getting the user "up and running". SO, what if the user just wants to dabble? At that point, I'd say this user has some choices to make.
Wilhelm jumps around a bit, but the steps are all there. Deciphering the Golden Flower One Secret at a Time puts those steps in simple, everyday-modern-English, straightforward, chronological order. What else does the user need? More concepts? More background? More metaphors?
All becomes clear once the user "gets into" the process. That's when the trial and error and the biofeedback processes begin to provide answers. That's when the milestones, and the signposts, and the benchmarks, and the signals become readable and understandable, allowing the user to move to next technique.
The other day I had to assemble two hard drives. The first one took longer than the second. Why? Because even though the manual was decent, I still had some trial and error to go through. I had to figure some things out. The second one was a breeze.
As to why a particular individual has an intuitive flash at any given moment in a process — be it assembling a HD or circulating the Light — it varies, but as long as he/she completes each step, feedback will be provided. The individual will KNOW that the step was managed correctly and will then move on to the next step, at the proper moment, allowing the process to proceed and terminate successfully.
This is true about meditation, about programming a DVD player, about learning to hit a curveball, about flying a plane. Feedback of various kinds — biofeedback or cell memory or muscle memory or plain ol' trial and error — is provided and should be used in mastering a given process. There is a nexus where Science & Spirituality meet.