No, ALL of the Bible was inspired. ALL of it is prophecy.
But, what about The Mystery? Something that was NOT prophesied, but hid in God from BEFORE the foundation of the world, until revealed to Paul by revelationS of the risen Christ?
The mystery must be in the prophecy (and it is), in order for it to be confirmed. It was hidden until it happened, just like Daniel required Hanukkah, Purim, and the Revelation of Yeshua in order for it to be calculated...
That makes up about 20%, but it's a BIG 20%. The most important part you will ever be a part of. And you are, you know, part of it, whether you want to be or not. Because we are LIVING in it. And have been since Paul was saved. And WILL be until the Church the Body of Christ is raptured.
No, it is from the cross, not from Paul. You forget Peter and Cornelius. And Isaiah. And you must understand that every argument has to come from the Tanakh because the NT had not been written yet. Definitions, pictures, allegory all must derive in the OT. That is where Yeshua was proven to those in His time..
Rom. 16:25, Eph. 3:9, and Col. 1:26: "NOW to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to THE REVELATION OF THE MYSTERY, which was KEPT SECRET SINCE THE WORLD BEGAN" (ROm. 16:25); "And to make all men see what is the fellowship of THE MYSTERY, which FROM THE BEGINNING OF THE WORLD HATH BEEN HID IN GOD, who created all things by Jesus Christ"(Eph. 3:9); "Even THE MYSTERY which hath been HID FROM AGES AND GENERATIONS, but NOW is made MANIFEST to his saints" (Col. 1:26).
There is a GREAT DIFFERENCE between that which was "SPOKEN by the mouth of all [God's] holy prophets since the world began" and that which was "KEPT SECRET since the world began".
You might want to re-think your position on this, since it FLIES in the face of what God has CLEARLY stated.