[PetroniusMaximus]

***We would have to see if Isis' words and Mary's words are "the same," instead of relying on a second or third-hand source.***

Correct.

Maybe John Locke can point us to a reference.

[John Locke]

Maybe John Locke can point us to a reference.

Plutarch, De iside et osiride. (Best translation is by Robert Graves)

Vera Vanderlip The Four Greek Hymns of Isidorus and the Cult of Isis (Listed by Amazon as out of print)

Malcolm Drew Donalson: The Cult of Isis in the Roman Empire

My previous post quoted from the first two books. The Vanderlip is a secondary source, but contains the primary sources complete.