Today, I posed some questions to the reiki class. They came to me in meditation some time ago as I contemplated one of the shirushi (symbols) of reiki. The one that still stands out for me is this one:
There is a question beyond all questions. What is it?
Any thoughts on this?
Evolutionary Tarot & Circle Ways 
“WHY WONDER WHY?” …kermit the frog
This is maybe not the question beyond all questions, but may well be relevant.
HSZSN bridges the gap between perception of separation of all things, If developmental growth leads us to an understanding of unification with all things then why do we need HSZSN?
I have found we do not as intention is the key, HSZSN is a hand rail to support in development, but may hinder true understanding of the true nature of all things at a later stage of development. Though all symbols are a key to understanding if used in a developmental way.
Just some thoughts
Yes, Rob. The shirushi and jumon are like training wheels on a bicycle. Once we know how to ride, we no longer depend on them. Once we become the shirushi on a deep level, no more need for the outer forms.