I would just tell it to you straight and simple right here.
As far as the construct of the Trinity, there is nothing straight and simple about the substance of the Gods....their state of being or their connection. That is why it has got so confused...people not paying attention to the scriptures and filling in the blanks.
but I can provide the explaination that Christ gave for the oneness concept.
Again, in relation to the Trinity it is the unity and the solidarity, in mind, in heart, and in spirit between Yahweh, Yeshua, and the Holy Spirit. God the Father gives us in
Genesis 2:24 an idea of how the concept of two people being one can be applied; “For this cause a man shall leave his father and mother and shall cleave to his wife; and they shall become one flesh.” Yeshua reiterates this concept in Mathew 19:5 & 6 and
Mark 10:8, specifically saying, “And they twain shall be one flesh: so then they are no more twain, but one flesh.” Certainly everyone understands that husbands and wives do not merge to be one physical human, nor do they lose their character. They certainly join physically but they are not absorbed into one person, even though the condition of solidarity may exist between them. So in that case the word one is not denoting “the number one” or the singularity of the two persons in the marriage. Beyond what is listed in the examples above, in the New Testament Yeshua gives us a clearer explanation of this concept of one. Speaking to God the Father (He is not talking to Himself) Yeshua says this about the concept of one...
John 17:21 “that they may all be one; even as You, Father, are in Me and I in You, that they also may be in Us, so that the world may believe that You sent Me.” Because Yeshua says “just as” this is an exactness, a duplication of a condition that we can achieve, and He states that this condition of “oneness” can apply to us, but it has nothing to do with absorption or singularity, but rather a condition of spiritual union and solidarity between God and us. The next verse further defines this by describing a unity with Christ that would cause the same condition with us as it did with them, a condition of perfection. Again, not talking to Himself, in
John 17:23 “I in them, and Thou in Me, that they may be perfected in unity, that the world may know that Thou didst send Me, and didst love them, even as Thou didst love Me.” In this context millions of people could be made one...one being a abstract concept of one, but a more literal meaning of unity, solidarity, and perfection and even a “body” that is considered one....the body of Christ or the body of the Church being one. And then, the next verse is probably one of the best verses to put this oneness concept into perspective. The leading verses are speaking of the works of the Holy Spirit and then ends with this explanation. 1st Corinthians 12:11-13 “But one and the same Spirit works all these things, distributing to each one individually just as He wills. For even as the body is one and yet has many members, and all the members of the body, though they are many, are one body, so also is Christ. For by one Spirit we were all baptized into one body, whether Jews or Greeks, whether slaves or free, and were all made to drink of one Spirit. For the body is not one member, but many.”