Echad is composite one, like the one body is composite one , marriage is composite one, family is composite one, in nature we have the same thing with one cluster of grapes

. The list goes on and on with plurality and one. A dichotomy, paradox, mystery you do not understand much like the Unitarian does not understand the same is true with the modalist/ oneness people like yourself.
Those with spiritual eyes

to see understanding the above.
ERROR, if your spiritual eyes told you that ... change out your spiritual eyes. because the ECHAD of God is not in parts.... that's your spiritual Eyes ERROR/ the ECHAD of God is in "EQUALLY SHARING" and this SHARING is in Ordinal Designation/
supportive scripture,
A. Genesis 1:1 "In the
beginning God created the heaven and the earth." the term "
beginning" describe God's "EQUALLY SHARING" in the plurality of "ONE".
beginning: H7225 רֵאשִׁית re'shiyth (ray-sheeth') n-f.
1. the first, in place, time, order or rank.
2. (specifically) a firstfruit.
[from the same as H7218]
KJV: beginning, chief(-est), first(-fruits, part, time), principal thing.
Root(s): H7218
Notice definition #1.
the first, in place, time, order or rank. let's back this up.
Deuteronomy 6:4 "Hear, O Israel: The LORD our God is LORD:"
one: H259 אֶחָד 'echad (ech-awd') adj.
1. (properly) united, i.e. one.
2. (as an ordinal) first.
[a numeral from H258]
KJV: a, alike, alone, altogether, and, any(-thing), apiece, a certain, (dai-)ly, each (one), + eleven, every, few, first, + highway, a man, once, one, only, other, some, together.
Root(s): H258
the Ordinal "FIRST/Father, and the Ordinal "LAST"/Son are not in Parts, but
in place, time, order or rank just as Genesis 1:1 states, and Philippians 2:6 CONFIRMS, "Who, being in the form of God, thought it not robbery
to be equal with God:" THERE IS THE ANSWER TO THE GODHEAD, "EQUALLY SHARED".
anyone who worship a three head/person God is in Polytheism ... meaning Idol worship. and the sad thing about it is that don't even know it. it called A "DELUSION"". supportive scripture, foretold, Isaiah 66:4
"I also will choose their delusions, and will bring their fears upon them;
because when I called, none did answer; when I spake, they did not hear: but they did evil before mine eyes, and chose that in which I delighted not."
NOW FULFILLED today, 2 Thessalonians 2:9 "Even him, whose coming is after the working of Satan with all power and signs and lying wonders," 2 Thessalonians 2:10 "And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved." 2 Thessalonians 2:11 "
And for this cause God shall send them strong delusion, that they should believe a lie:"
and the
LIE... "God is three persons".
101G.