What is this mystery in Romans 16:25 which had been hid since the ages began?
This is not the mystery that had been hid in God from ages and generations which you will find in Colossians and Ephesians. The context of this verse reveals that it is the mystery of Christ which Paul is preaching to the Romans. The mystery of Christ began with the creation in Gen 1:1 of which we find later He is the Creator. Eph 3:3-5 tells of the mystery of Christ. It was known to the sons of men in past ages. But not as fully as when Paul finishes the Word of God, the canon of Scripture, showing Christ to be Head of The Church which is His body. Romans 16:26 tells that this mystery of Christ is manifested by the Scriptures of the prophets. Now the prophets of Eph 4:11 had not written Scriptures at this time of writing. A part of the mystery of Christ is well set forth in Isaiah 53. In fact all the Scriptures speak of Him and further reveal the mystery concerning Him. And in Romans, Christ is brought out as a federal head in contrast to Adam, showing that by Adam came sin and death,
