The Spirit gives life; the flesh counts for nothing. That life appeared and was testified to. 1John1Jesus was the Word, before He took on flesh.
Just the taking on of the flesh makes your last line a mistake.
He isn't the same as when He was the Word.
I agree the Son of Man didn't exist but Jesus, His Spirit, did exist. He was not that body. He was in that body.
Yes, The only begotten Son came down from the Fathers Presence as the only such eyewitness.Then you do have the proof you need.
It wouldn't make sense, as they are referred to as "US" in Gen 1:26.
Two beings, God and the Word.
The Word became Jesus, after He took on the flesh.
John 1:18