Before Jesus came in flesh he is the Spirit that created everything, per John 1:3, and Isaiah 44:24, and Genesis 1:27, from Genesis 1:1.
this is what make the Godhead a plurality. listen,
Isa 63:5 And I looked, and there was none to help; and I wondered that there was none to uphold: therefore mine own arm brought salvation unto me; and my fury, it upheld me".
May we ask anyone is your arm separate from the rest of YOU? no. nor is God "OWN ARM". For God is Spirit, so he has no arms legs ect.. as the Spirit correct, so the same nature was "shared", hence the SAME nature, but the share was G2758 κενόω kenoo (ke-no-ō') v.
now if it the same Spirit, (and it is), but the share was G2758 κενόω kenoo, now we have the "LORD", before the G2758 κενόω kenoo, and "Lord" after the G2758 κενόω kenoo. BINGO, it's the same PERSON. but how the same person, but yet a plurality? great question, now the great answer.
Phil 2:6 Who, being in the form of God, thought it not robbery to be equal with God".
so the nature is equal, but how equal but yet G2758 κενόω kenoo? the answer is in the root of "FORM", G3444 μορφή morphe (mor-fee') WHICH ADDRESS THE "EQUAL" NATURE, now the NATURE as the plurality of ONE PERSON, is addressed by the root word itself,
G3313 μέρος meros (me'-ros) n.
1. a portion (i.e. an amount allotted, a part of something).
what is another word for "Portion?".... "SHARE". the Lord Jesus the Christ is God's EQUAL "SHARE" manifested in flesh as a "MAN", that is G2758 κενόω kenoo while in that flesh. notice, notice, "my own arm", once again "MY OWN ARM", brought salvation to me. see Isaiah 63:5 above here in this post.
this is the Godhead in a nutshell. God, G2320 θεότης theotes (the-o'-tees) n. "SHARED EQUALLY" in FLESH as a man without the Godly attributes.
PICJAG.