When Ephesians 5:22 says, “Wives, submit to your own husbands, as to the Lord,” the word as does not mean that Christ and the husband are the same. Christ is supreme; the husband is not. Her allegiance is first to Christ, not first to her husband. The analogy only works if the woman submits to Christ absolutely, not to the husband absolutely. Then she will be in a position to submit to the husband without committing treason or idolatry.
John Piper