1cor 15:45 "The first man Adam became a living being, the last Adam became a life giving spirit"
1 Corinthians 15:45
The first man Adam became a living being, the last Adam became a life giving spirit
If there was a first Adam, then there is a last. If there was a first Eve, then there must be a last Eve. The last Adam is Christ and the last Eve is the church.
God created the church out of the body of Christ. He put Christ into a deep sleep lasting for 3 days. Christ came out of the grave with a hole in his side, the fifth rib to be precise. So in light of this, the mystery of marriage is but a foreshadowing of God's purpose in Christ. (John 19:34, 20:27)
In Gen 2:23 First, the first Adam said "Now at last, this is bone of my bone and flesh of my flesh"
In Ephesians 5:30 Of, of the Last Adam it is said: "We are members of his body, of his flesh and of his bones.
So this is the profound mystery that Paul was talking about.
Marriage itself was created to foreshadow Christ and his church in the new covenant (Ketubah as the Rebecca park totillo calls it due to the way the covenant was enacted with the apostles)