This book explores Karl Barth’s doctrine of sanctification as set out in “The Sanctification of Man,” §66 of the Church Dogmatics. In his analysis, Michael Bartholomaeus reflects on the role Barth’s various engagements with Scripture play in the flow of his theological argument as well as the significance of his interaction with other voices from the tradition. He then examines select aspects of Barth’s theology of sanctification in greater depth, including how Barth’s use of Scripture in §66 can be understood as the exegetical background to his dogmatic exposition, the similarities and differences between Barth and Calvin on the question of sanctification, and how seriously and biblically Barth speaks of visibility and growth in the Christian life.