Interpreters of Karl Barth’s theology have long noted a limited role for the Holy Spirit in his work. JinHyok Kim challenges this prevailing paradigm, reconstructing Barth’s pneumatology and proposing the possible contours it would have taken in the final volumes of Church Dogmatics left incomplete at Barth’s death. Within this reconstruction, Kim explores the contexts of Barth’s work and demonstrates the connection of Barth’s doctrine of the Spirit with the realities and practices of the Christian life. Here a new standard for understanding Barth’s Trinitarian theology opens up and offers fresh reading of an important topic in modern theology.