Dan 10:6 [Voice of a Multitude? = Body of Christ] 1 Cor 12:12-27

This type of "reasoning" is childish. The scriptures tell us to "think like men" and "believe like children" You've got to grow up. 1 Corinthians 13:11

God is God. It is not that we are inside of Him speaking through Him. He is inside of us speaking through us. God has every voice possible because he is God. There is nothing outside of his control. And he uses each voice by his Spirit.

And he said, ‘The God of our fathers appointed you to know his will, to see the Righteous One and to hear a voice from his mouth; ~Acts 22:14

He chooses which voice to speak by according to the moment. The way you are talking is backwards. As if the bride of Christ came before Christ. But the body of Christ comes because of Christ.

The reality that we are in Christ comes out of a process and is not already or automatically happening.

that they may all be one, just 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 have sent me. ~John 17:21

He is saying "that" they also may be in us - for the purpose of them being in us. We are not yet "in" God. God is already God.

Ekklesia are in Christ (God). We were crucified with Christ, and the life that we now live we live by faith in the son of Yahweh.
The Ekklesia in the NT
lived and walked daily "in union" with Jesus and the Father (see "in union" repeated many times in the NT)
, full of righteousness, peace and joy daily, continually (rarely seen today).