The bible overwhelmingly affirms the Godhead as two...father and son. The concept of “three” did not become codified until at least 300 years after the death of Christ.
John 14:16-17-”And I will ask the Father, and He will give you another Helper, that He may be with you forever; [that is] the Spirit of the truth, whom the world cannot receive, because it does not behold Him or know Him, [but] you know Him because He abides with you, and will be in you.”
John 14:26-”But the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all that I said to you.”
John 15:26-”When the Helper comes, whom I will send to you from the Father, [that is] the Spirit of truth, who proceeds from the Father, He will bear witness of Me.”
John 16:7-8-”But I tell you the truth, it is to your advantage that I go away; for if I do not go away, the Helper shall not come to you; but if I go, I will send Him to you. And He, when He comes, will convict the world...”
John 16:13-15-”But when He, the Spirit of truth, comes, He will guide you into all the truth; for He will not speak on His own initiative, but whatever He hears, He will speak; and He will disclose to you what is to come. He shall glorify Me; for He shall take of Mine, and shall disclose [it] to you. All things that the Father has are Mine; therefore I said, that He takes of Mine, and will disclose [it] to you.”
The Holy Spirit has been mentioned even in the OT.
If the Holy Spirit is NOT God, then what is he/it?