Your only reason for attempting to derive the doctrine from Egyptian mythology is that you do not wish to admit that it is from God. The Egyptians derived their religious notions from their own every-day life. They had a multiplicity of gods, a god for every locality, each associated with some animal as a symbol Later the idea grew that the gods resided in statues combining human figures with animal heads. Legend made the gods marry, sometimes two goddesses to one male god, thus forming a triad. Or again, the number three was derived from the family unit of father, mother, and child. The mother was the counterpart of the father, and that father lived again in his child. Religious idealization attributed these notions to a supreme god, and the Egyptians spoke of Osiris, Isis, and Horus, father, mother and child. But Isis and Horus were both inferior to Osiris, and all three mere myths. Nor does even the mythical notion imply a tri-unity or trinity in anything like the Christian sense of the word, nor any true divinity of infinite perfection.The Oracle of Serapis certainly never used the words you quote. The books of Trismegistus Hermes, or the Hermetic Books, which are the great source of Egyptian mythology are full of Neo-Platonic and post-Christian interpolations and additions, and are unreliable. The attributing of the expressions “Father, Son, and Holy Spirit” to the Oracle of Serapis is but a subterfuge of enemies of Christianity who wish to suggest that the doctrine was never revealed by God. Anyone Can attribute anything to anybody. It is a different matter if you ask for proof of authenticity. Men who will not believe in the doctrines of Christianity with evidence, will swallow oceans of oracles without evidence. Their eagerness not to be credulous when the historical Christ speaks is absurd in the light of their immense credulity when anybody merely mentions the magic words Oracle of Serapis. Their dislike of Christianity at once makes possible any anti-Christian assertion. But this is not rational.
Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty