Ephesians 3:3-4. “How that by revelation He made known unto me the mystery; (as I wrote afore in few words, Whereby, when ye read, ye may understand my knowledge in the mystery of Christ)”
“The mystery” referred to in this passage is the Church. God revealed His plan to Paul, in order that Paul would take the gospel to the Gentiles. Again, Paul established his apostleship in this passage, assuring his readers that the mystery of the Church was given to him directly from God. That revelation is why he speaks with authority.
The Church still exists today. In spite of Satan’s efforts to destroy it through many nefarious means, it has stood the test of time. Jesus said that the very gates of hell would not prevail against His Church. Satan is ramping up his efforts right now, using one of his favorite devices: Division within the Church, as well as attacks from outside the Church.
Stay tuned. The rest of this book includes practical Christian living. It’s rich and deep.