Well God cannot lie and He calls that Lamb His "Son" not Himself!!
You misunderstand the concept of the Word of God. Jesus tells us no man has EVER seen the Father OR heard his voice, the Son declares Him (which means makes Him manifest). So every time the Lord (YHVH) appears and speaks in the Tanakh (the Old Testament) it is the Word/Son. The Word/Son is the hypostasis of YHVH that people can see and hear, NOT the Father. The YHVH who sends and the YHVH who is sent are still the one and only YHVH. This concept comes from the Israelites. When Jocob wrestles with the Man of God he tells us this was THE God. In Exodus 3 when the Angel of the Lord appears and speaks to Moses (as the bush that burned but was not consumed) He reveals Himself to be that I AM the God (the one and only true God) of Moises fathers (Abraham, Isaac, and Jacob). In Isaiah 48 we hear YHVH speaking and telling the prophet that He IS the one who spread out the heavens, etc., but then in verse 16 says that the Lord of Hosts has sent Him with His Spirit. The example are manifold. The ancient Israelites under stood this but the concept was lost in the Greek and later Latin theologies. However, even the language of Nicea put it like One Ousia in three Hypostases. If you read the Targum Jonathan (the mid-first century summation of the Jewish understanding written in Aramaic) you see how Jonathan makes this aspect of YHVH very clear. The Father is all YHVH is that is separate from or transcendent to His creation (we are incapable of seeing and hearing His essence in the flesh), the Son is that aspect of YHVH that allows us to comprehend, see, and hear Him and is with us, and the Spirit which we can sometimes hear but never see but can experience is YHVH within us. One YHVH not three or some corporate beast but ONE and only ONE but made comprehensible as much as possible to humanity.
Here are a couple of examples:
In Genesis it is written that YHVH (sitting in the tent with Abraham) sends forth the two men (who are angels manifest in the flesh) to rain down fire and brimstone on Sodom and Gomorrah from YHVH in heaven (but there is only ONE YHVH.
On Exodus 24:1, The Targum Jonathan understands the scripture to be saying, “the Word of YHVH said to Moses, come up to YHVH“, and just previously in 20:1, he said, “and the Word of the LORD spoke all these glorious words“!
Targum Onkelos renders Genesis 15:6 as, “and Abraham trusted in the Word of YHVH, and He counted it to him for righteousness“, while the Jerusalem Targum on Genesis 22:14 says, “and Abraham worshipped and prayed in the name of the Word of YHVH and said, You are the YHVH who does see, but You cannot be seen“. In Genesis 16:3 he has Hagar praying “in the name of the Word of YHVH“, as if God had made Himself seeable, and yet she was not consumed!
This is the One to whom John explains in John 1:1-3...He is telling the diaspora Rabbis who still did not believe, that THIS Jesus IS the Word/Son in which they already were aware (or at least should have been since they were allegedly teachers of the Tanakh, like when He is confused when He had to explain to Nicodemus the concept of being born again which Nico should have already understood). Keep asking. Keep growing. Pray the Spirit will lead you and guide you into ALL truth. But know that all this was already known about before any New Covenant writings were penned.
