Let us attempt to correctly finish that thought:
While the Father, the Son and the Holy Spirit are one, they are also separate manifestations of the same eternal unchangeable substance.
This is not to say that the living body inhabited by the Son could not be changeable by growth, ageing, need for nutrients, repair of damage to its fleshly components, presence of symbiotic microorganisms both externally and internally, and other contemporary effects; yet His eternal soul and Spirit remained the same though incarnated.
This is reminiscent of the character of a typical compound of elements whose temporal circumstances call forth its distinct differentiating manifestations:
o solid
o liquid
o gaseous
according to the phase rule, discovered in general revelation and enunciated by the mathemetician J. Willard Gibbs (click here) over a hundred years ago.
This tells us that the mysteries of God, put into effect at the beginning of this temporal phase of eternity, are still being unfolded for us according to God's plan in the fulness of time, and there is more, much more yet to come.
Likewise, the facts of the special revelation of The God's salvation plan in which God progressively revealed His Will/Covenants/Testimonies by the prophets, are still being seen in the the light of history and science by prophets of the general revelation. Such Scriptural knowledge, not seen by earlier religious "experts" despite their time in history and their desire to hide their shortcomings (Rom. 1:18-22; "hold" = withhold), now refutes and revokes the humanistic theism they invented to cover their blindness and inability to exercise faith in the Word of God alone.
Recently discovered scientific principles and medical procedures have shown us that the myth of Mary's "Immaculate Conception" was a logical artifice constructed by biologically-ignorant geniuses (who also debated about the number of angels the head of a pin could accommodate, and that the Earth is the center of the universe) in continuing their prideful grasp on the credulity of serfs and power of emperors.
Medical science and technology has shown us that it is entirely within the scope of human intelligence to implant the zygote of an otherwise childless couple in the womb of a willing but unrelated surrogate host female to bring the new person into the world. How much more so that the omnipotent, omniscient Almighty and Reverend God should bring the human residence of His Only Begotten-in-the-Flesh Son into the world, at the time and place in history that the Father saw fitting.
This, of course is speculation, but it is more than just idle conjecture. And this approach clearly surmounts the Scripturally indefensible doctrines of Mary's conception, everlasting virginity, and deathless assumtion that the unlearned "sages" were forced to adopt to make their logical artifice hold together.
The Calvinists, Baptists, and Darbyites--the Sola Scriptura and sole fide faithful Christ-followers--have a progressively firmer stance as the facts of general revelation continue to unfold, and the eschatology of the Bible departs from the humanistic amillenialism and preterism that has kept the gullible religionists in the category of a cash cow to serve the unitary organized state-sponsored churches.
Thank the Founders of the United States Constitution and its Amenders to keep religious liberty alive, free of the quashing intent of those who wish to exercise the slavery of historical Christendom to overcome the remnant of true disciples of the coming Messiah, and His Thousand-Year Kingdom of Righteousness and Peace.