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Sorrry -- I expected you to be familiar with the term, which is a concatenation of the Hebrew words,
Tohu: תֹּהוּ
and
Bohu: בֹּהוּ
which are used in the Bible when it says "...the earth was without form and void".
I actually prefer the full concatenated form, (including "and" = "wa" = וָ ):
תֹ֙הוּ֙ וָבֹ֔הוּ,
which is anglicized as either "Tohu wa Bohu" or "Tohu wa-Bohu".
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Either way, the term describes the chaotic, formless, isotropic emptiness which our Creator organized into the structure of our universe when "The Spirit of God hovered over the face of the waters"...
The presentation is almost at a halt, due to problems with "Canvas", the graphic software. ACD Systems has "re-tooled"the software to run on this current MacOS -- and has eliminated or messed up critical features used in the presentation. Thousands of us "orphaned" users are anxiously waiting for them to get their act together. :-(
Thank you, TXnMA — I’m sorry to say I speak and read zero Hebrew....