Paul's aim in preaching and teaching, in praying and pastoring, is to see the likeness of the Messiah displayed not simply in individuals but within and among churches ('Christ' is often used to indicate the corporate nature of the church). But 'displayed' doesn't do justice to what he writes: formation is his goal; being shaped and fashioned into the life and character of the Saviour, in the power of the Holy Spirit.
It is not for nothing that he uses in this verse the metaphor of childbirth, the forming of a life in the womb and its being brought into the world. Formation is a long process, whether it's gestation or the processes we see in the natural world - rocks smoothed and shaped by the incessant pressure of the waves and rivers; landscapes sculpted by the weather over long ages.
That we're thinking about a lengthy process means we're forced to contend with the need for patience and perseverance, for arduous toil, in all weathers and, often, against the tides. It's good to be realistic and clear-eyed about what is involved.
Formation is no easy work but it is deeply worthy. The life of God in the warp and woof of the souls of men and women. Originally made in his image but deformed by sin's ugliness, that marred image is now being renewed, the deep flaws being healed, cleansed by the washing with water through the gospel word.
Christ is being formed in us - and among us - as his people. To willingly submit to his shaping of our souls and to partner with him in working out his salvation in our lives is a high calling. It takes time; much time. It will take the wisdom and power of God, of the crucified and risen Lord.