Beginning in Ephesians 2:11, Paul tells how God through Christ Jesus has brought together Jews and Gentiles. He has made them one in Christ. Paul refers to this as “the mystery of Christ” (Ephesians 3:4), and goes on to explain that “this mystery is that the Gentiles are fellow heirs, members of the same body” (vs. 6). Paul even continues this line of thought by saying that this mystery was hidden for ages (vs. 9).
In my mind, this begs the question, why was it hidden? Verse 10 gives the answer. “So that through the church the manifold wisdom of God might now be made known…” God’s wisdom is being made known through the church. It is in this mystery – that all believers are now one in Christ – that God’s wisdom becomes evident. It was hidden, but through us it is made plain.
No wonder Jesus declared that our love for each other would be the evidence of our discipleship to Him. It is in us being one in Him that God’s wisdom, previously hidden, is now made evident. That which was covered is now uncovered through us, the Body of Christ.
To me, the real mystery is why a holy and perfect God would choose to reveal His wisdom through the likes of us. What an amazingly gracious and loving God we serve!