“...and the diversity within the Godhead (hypostasis)”
One hypostasis, three hypostasia.
The Cappadocians are noted for the expression, “I believe in God; God does not “exist”.” That little phrase is of fundamental importance when trying to comprehend the theological dogma that the three hypostasia of the Trinity are “homoousios”. Failure to accept that dogma and to understand it insofar as that is possible, inevitably leads today as it did 1600+ years ago, to both Trinitarian and Christological heresies.
The Cappadocians are noted for the expression, “I believe in God; God does not “exist”.”That certainly is an interesting way to put it. Do you know the source of that quote? I tried to google it and all that came up was FreeRepublic. :)