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) Which in other ages was not made known unto the sons of men, as it is now revealed unto his holy apostles and prophets by the Spirit; That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel. (Ephesians 3:3-6)
The book of Ephesians reveals God’s plan that He calls the mystery. Mystery is the word musterion in Greek. It means secret or mystery. God’s secret was that the Gentiles would be saved. Speaking of all nations, Paul went on to say: “of whom the whole family in heaven and earth is named, That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man; That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love” (Ephesians 3:15-17). What a mystery this was to the early church! The Gentiles, who were considered unclean heathens before Jesus, could now become part of the family of God and Christ, the Anointed One, would live inside of them.
The Gospel – that all families of the earth are blessed because of Abraham's seed - is possible because of God and Abraham's relationship. When God found that man, He entered into a covenant with him. Abraham trusted God so much that he was willing to give up his only begotten son as a sacrifice. Since that man, in covenant with God, was willing to give up his son, God gave up His only begotten Son, Jesus.
Jesus died on the cross, bearing our sins and sicknesses and diseases. He went to hell in our place, was raised from the dead, and ascended into heaven. Then the Holy Spirit came, not only upon the Jews but on the Gentiles as well.
Practical Application – Old Testament Jews couldn’t imagine the mystery that God had planned for the world, but we are grateful to be part of that mystery as believers!
Acts 10:44; Romans 11:25