This is a great mystery: but I speak concerning Christ and the church.
All Commentaries on Ephesians 5:32 Go To Ephesians 5
Why does he call it a great mystery? That it was something great and wonderful, the blessed Moses, or rather God, intimated. For the present, however, says he, I speak regarding Christ, that having left the Father, He came down, and came to the Bride, and became one Spirit. For he that is joined unto the Lord is one Spirit. (1Corinthians 6:17) And well says he, it is a great mystery. And then as though he were saying, But still nevertheless the allegory does not destroy affection.