“The Church is largely wasting her time in talking politics, and in imagining that, if you give people the Christian ethic and urge them to practice it, the problems of the world will be solved. It cannot be done: regeneration is essential. God produces this final harmony again by regeneration, a new creation, new men in a new world—‘new heavens and a new earth wherein dwelleth righteousness’. That is God’s method. It is only as we are all ‘in Christ” that we can be reconciled. We become members severally of his body. ‘Ye are the body of Christ, and members in particular’ and so the eye does not say to the foot ‘I have no need of thee’, nor does the hand speak thus to any other part. All the parts are essential (1 Corinthians 12:14-27). That is the picture. All one—not in Christ as teacher, but vitally, spiritually, mystically, members of His body and united in Him by the Holy Spirit.”
Martin Lloyd-Jones, ‘We…Ye also’ Sermon on Ephesians 1:11-14.