The plain truth is in the scriptures you deny.
God is One.
God is "all in all" in heaven and on earth.
The One omnipresent God cannot be divided.
God can do all things. He can appear in the image and likeness of man on earth while being present in the spirit, in heaven.
Jesus is the image of the invisible God, the firstborn (most important) of all creation; for in him all things in heaven and on earth were created, things visible and invisible, whether thrones or dominions or rulers or powers—all things have been created through him and for him. He himself is before all things, and in him all things hold together. He is the head of the body, the church; he is the beginning, the firstborn from the dead, so that he might come to have first place in everything. For in him all the fullness of God was pleased to dwell, (Col 1:15-19 NRSV)
The word 'NOT' in the diagram teaches modalism.
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Again, I suggest you study both Modalism and Trinitarianism. Straw men arguments get us nowhere.
Here are some of the reasons that Jesus cannot be the Father, the Son, and the Holy Spirit, whether simultaneously existing as each or not.
1. The use of the relational terms of Father and Son is meant by God to reveal something about himself. However, if Father and Son are actually the same person, then God’s use of that relationship isn’t something we can understand and so communicates nothing to us, since a father can never be his own son nor a son his own father. The very idea is irrational.
2. Throughout the Bible, the Father, Son, and Holy Spirit are always mentioned distinctly. This becomes a pointless exercise if they are actually all the same person. It would have been much simpler to just refer to himself as God or Father.
3. God is love (1 John 4:8, 16). This is speaking of God’s very nature; a necessary attribute. Love, however, in its greatest expression, is an action or feeling towards another—“Greater love has no one than this, that someone lay down his life for his friends” (John 15:13). So, if God’s nature is love, and God is eternal, then there must be at least one other to whom that love was expressed for all eternity past. Therefore, there must have been at least two distinct, divine persons coexisting for eternity past in loving relationship.
4. Jesus intercedes for us (Rom 8:33-34; Heb 7:25). Interceding is mediating between two or more parties. Jesus, as the great, sinless high priest and sacrifice, truly human and truly God, is the one who intercedes for us. He is the God-man whom alone can and does mediate between God and man. This makes no sense if there is only one person; one does not intercede with oneself.
5. Jesus is our advocate with the Father (1 John 2:1). Advocating is only done on behalf of one party to another. It does not make sense to say one advocates with oneself.
6. In John 14:16, Jesus said he “will ask the Father, and he will give you another Helper.” Firstly, it doesn’t make sense to ask oneself to send another self. Secondly, “another” means one that is different or distinct from oneself. If they are all the same person, these distinctions are meaningless and don’t make sense. In John 14:26, the Father will send the Helper, the Holy Spirit in Jesus’s name. More than that, he would teach all things and bring to memory all the Jesus said to the disciples. Again, clear distinctions are made that make no sense and are meaningless if the Father, Son, and Holy Spirit are all the same person.
7. In John 15:26-27, Jesus says he will send the Holy Spirit, who not only “proceeds from the Father” but will “bear witness about” Jesus. Bearing witness is something done by another person, just as verse 27 shows (see also Matt 18:16).
8. In John 16:7 Jesus said it is to the disciples’ advantage that he goes away, to the Father, so that the Helper comes, whom he will send. Then in verse 13, Jesus says the Holy Spirit, the Spirit of Truth, “will not speak on his own authority.” This raises the question: if Jesus is the Father, the Son, and the Spirit, how is it that Spirit “will not speak on his own authority”? Jesus then says that “whatever he hears he will speak.” Again, to whom is the Holy Spirit listening if he is Jesus? Then, in verse 14, it is the Spirit that will glorify Jesus, “for he will take what is mine and declare it to you.” How does one take from oneself? None of these things makes rational sense. If Jesus is the Father, Son, and Holy Spirit, then why is this so needlessly complicated? Why didn’t Jesus just say he was returning to his position as Father and would also return in spirit form to help his followers?
These types of arguments could go on for quite some time yet, but that should more than suffice. The language used throughout the Bible, particularly in the NT, of the Father, Son, and Holy Spirit simply does not make sense if they are all one person and would needlessly complicate matters.