Thank you, Terry. I will rethink that part again.
I am wrong to use "Christian" definitions of "mysticism" and "mystery". I need to provide the understanding of these terms during the Second-Temple period (which includes Paul).
To give you an idea of the slippery slope that befuddled my ancient grey cells, I have provided the "Christian" definitions here:
https://jwstudies.com/Defining_Christian_Mysticism__Inge.pdf
https://jwstudies.com/Defining_Mysticism__a_Survey__Zarrabizadeh.pdf
Regards -- and thank you,
Doug