Here is the essential movement. The reality of the church emerges out of the saving action of God in Christ through the Spirit; the church is the providential means and sphere through which persons are enabled to participate in eternal life. The birth of the church of Jesus Christ is engendered by the regenerating power of the Spirit. The nurture of the church occurs by grace through Word and Sacraments. The present church shares in the communion of saints in time and eternity. In this way, the flowing sequence of classic Christian teaching draws all post-Ascension topics of theology into coherent order (John of Damascus, OF 3.1, 6, 19).