Our motivation for biblical manhood and womanhood in marriage is the gospel.
I am convinced that the complementarian position will strengthen the church in her God given-role to proclaim and protect the gospel. And the most effective apologetic for the complementarian position (apart from Scripture) is marriages, families, and singles who radiate the beauty and wisdom of God's plan for men and women.
Biblical manhood and womanhood is the life-transforming effect of the gospel on full display. When a church teaches, practices, and honors gender distinctions determined by our good and wise God, the gospel will advance. But this will only happen where there are humble and courageous pastors who lead every member and ministry of the church by personal example and with strategic pastoring.
Yet here's my concern: It is all too easy for us as pastors to affirm biblical manhood and womanhood and to contend humbly for the complementarian position, and yet still fail to intentionally and consistently apply this body of teaching to our lives and to our churches. Pastors must not only proclaim truth but practice truth.