In Isaiah 48:12-16 God declares,
12 "Listen to Me, O Jacob, even Israel whom I called; I am He, I am the first, I am also the last.
13 "Surely My hand founded the earth, and My right hand spread out the heavens; when I call to them, they stand together.
14 "Assemble, all of you, and listen! Who among them has declared these things? The LORD loves him; he will carry out His good pleasure on Babylon, and His arm will be against the Chaldeans.
15 "I, even I, have spoken; indeed I have called him, I have brought him, and He will make his ways successful.
16 " Come near to Me, listen to this: From the first I have not spoken in secret, from the time it took place, I was there. And now the Lord (Father) has sent Me (Son), and His Spirit (Holy Spirit)."
The ONE speaking here is the Word of God of John 1:1-2 who became (was not created) flesh in John 1:14.
This part of your post was deleted. Now stick to the rules or I will simply delete your posts that try to take this thread off topic. You started your own thread defend the Trinity there.