This promise was further revealed in amazing clarity to Paul. The idea of the Gentiles hearing and believing the gospel was not clear to even Peter. Paul declares that “the mystery was made known to me by revelation, as I have written briefly. When you read this, you can perceive my insight into the mystery of Christ, which was not made known to the sons of men in other generations as it has now been revealed to His holy apostles and prophets by the Spirit. This mystery is that the Gentiles are fellow heirs, members of the same body, and partakers of the promise in Christ Jesus through the gospel” (Ephesians 3:3–6).
Notice that Paul calls this promise and idea of God a “mystery” or secret, a “plan of the mystery hidden for ages in God who created all things” (3:9). God kept much of His plan secret until the coming of the Holy Spirit so that it could be fulfilled in His power as far as the ends of the earth.
When we think that this is the wisdom of God revealed to the right people at the right time, we must be like Paul who said, “I bow my knees before the Father” (3:14). There is no other response. This will lead us to devote our lives to finishing the task.