John Calvin on Ephesians 5:29

29. Even as Christ the church. He proceeds to enforce the obligations of marriage by representing to us Christ and his Church; for a more powerful example could not have been adduced. The strong affection which a husband ought to cherish towards his wife is exemplified by Christ, and an instance of that unity which belongs to marriage is declared to exist between himself and the Church. This is a remarkable passage on the mysterious intercourse which we have with Christ.