This is something I had not thought of before. Explain a little please:)
I can't speak for "OLDREGGIE" but it seems the verse to follow . . .
For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Spirit.
Additionally, this "rightly divides" with . . .
All scripture is given by inspiration of God, . . .
Other than the simple analogy of a CEO dictating a letter to an Admn. Asst. wherein the CEO is the "author" even though the Admn. Asst. did the writing, I've yet to study why God had man write for Him. There are many answers to this. However, if one chooses to believe that chosen "holy men" were NOT given revelation from God to write God's word . . . well . . . what do we have? Man's word. No thanks . . . I choose to believe that God made His word available so we could all know his plan of redemption and his Will for our lives. God bless!
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Above all, you must understand that no prophecy of Scripture came about by the prophet's own interpretation. For prophecy never had its origin in the will of man, but men spoke from God as they were carried along by the Holy Spirit.
He is saying that the prophet didn't make up the prophecy and it is not just his own opinion, but rather the very words of God. The process was the same and true for all of those humans that God used to give us His Word in written form. So we cannot claim it was just Paul's opinion or Moses opinion, etc. The key in the verse that makes this true is "came about", referring to the source of the message, not the hearer or reader.