You said:
“Son of God, No not until we are begotten of God through the Holy Spirit ''Born again''”
Can you provide even one scripture that states any OT saint was “begotten of God through the Holy Spirit ''Born again'' ?
If we can’t get our terminology in line with each other it is no wonder we can’t get our doctrine to agree.
No Old Testament saint was born again in the same way we are after the death burial and resurrection of Christ.
John 14:17 Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.
Let’s look at the disciples. When Jesus made the above statement the disciples had the Spirit with them but not in them. That could not happen until after the death burial and resurrection of Christ and the “Spirit” began to dwell in the hearts of men not just rest upon them as was the case with OT saints.
1 John 2:27 But the anointing which ye have received of him abideth in you, and ye need not that any man teach you: but as the same anointing teacheth you of all things, and is truth, and is no lie, and even as it hath taught you, ye shall abide in him.
Notice how John describes the believer after the resurrection of Christ. The anointing (Spirit) abideth in you.
This is one big reason that the argument that tries to link the use of the phrase “son of God” in the NT to the use of the phrase in the OT falls flat. A son of God in the OT is simply not the same thing as in the NT and is is total error to try and make them the same.
Let’s put on our thinking caps and let me ask you a question about Thomas. Thomas was not with the other disciples when they first believed that Christ was risen John 20:22 Jesus breathed on them and they received the Holy Spirit. I am convinced that is the moment they became born again NT believers. They were not grandfathered into salvation just because they walked with Christ. They had to believe He was the risen savior like everyone else who is born again under the New Covenant.
Now to my Thomas question. John 20:25 when Thomas said “Except I shall see in his hands the print of the nails, and put my finger into the print of the nails, and thrust my hand into his side, I will not believe” was he at that time a born again NT believer, saved by the blood of the Lamb? I argue no he could not have been . He stated he would not believe Christ was risen unless he could see and verify. Saying “I will not believe” will not get anyone saved, no not even Thomas.
27 Then saith he to Thomas, Reach hither thy finger, and behold my hands; and reach hither thy hand, and thrust it into my side: and be not faithless, but believing.
Jesus in His mercy allowed Thomas to verify.
28 And Thomas answered and said unto him, My Lord and my God.
I believe at this moment Thomas was a born again, saved by the blood, NT believer.
29 Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed.
Jesus confirms this in the above passage. Thomas’s case was unique, we fall into the latter category “blessed are they that have not seen, and yet have believed”.
To your question, “How did Adam make it to heaven” . I don’t think we can say beyond a shadow of a doubt what his eternal status is. If you can prove it by scripture I am open to what you have to say. I think most assume he was in right standing with God when he died and if that be true he went to the place called Abraham’s bosom, (Luke 16:22), in the heart of the earth not heaven. After the resurrection of Christ it is my belief he would now reside in heaven. That’s my story and I’m sticking to it.