What is the implicit secret in the following important references that qualifies the “people to whom the message was given as gods?”
1) The Law (Psa. 82:6) and
2) The gospel (John 10: 34-35)
That word "gods" is a funny word. It is based on the word "Elohim" and Elohim means "Children of YHVH" or "Images of YHVH".
So, the real secret is that, in order for us to BE Elohim, we need to be LIKE YHVH in character (righteousness seeking people).
Based on "Elohim" meaning "children of YHVH" (or "images of YHVH"), there is indeed much more in the word "gods" as used in the Law (Psa. 82:6) and the Gospel (John 10: 34-35) than meets the eye. There may be a connection here with the scaling up of the prospect of transformation of people's lives from "born physically of human parents" to "born spiritually of the Spirit" with a specific point of change at the death of Jesus Christ on the cross.
An eye-witness is the "disciple Jesus loved" accompanied by two independent witnesses, viz.: Nicodemus and Paul (John 3: 21-21; 7: 45-52; 8: 21-32; 19: 30-42; Rom. 8: 28-30).
If so, it seems to me that the gospel is very much corrupted today. Isn't it?
Unfortunately, it is corrupted. Don't forget that the church had the books all to themselves until their translation into other languages (for over 1,000 years).
The most important thing to understand about the Bible is that it was written in the Hebrew mindset (there are debates that say the New Testament was originally written in Greek, but I do disagree with that, however, the writers WERE Hebrew). The Hebrew language is very rich with symbolism (hence the parables), so a Hebrew word doesn't necessarily have the same meaning in English as it does in Hebrew.
People did have the Holy Spirit before Yahshua's life and ministry, so I don't think that has anything to do with it. The point of Yahshua's ascension was around the time of the Feast of First Fruits, though, which makes spiritual sense. The time of his return will probably be before the Feast of Tabernacles (Succoth). We really have learned a lot from keeping the Holy Days, which are a Shadow of Things to Come. We have a breakdown of the crucifixion on our website, and a timeline of events according to the Bible.
Now, this may offend some, I'm sure, but I have heard the theory that the "disciple Yahshua loved" was his physical son. This is just a thought.