After completing his prolegomena to dogmatics, Barth moves on to the content of the dogmatic project in treating the doctrine of God. In doing so, he divides this volume's explication into the knowledge of God and the reality of God. Barth avers that the knowledge of God is grounded in God's action, which is communicated in the event of revelation. As Eberhard Jungel phrases it, for Barth 'God's being is in becoming,' which describes a forward looking, dynamic understanding of God's nature. Barth closes this half-volume with detailed exposition of the attributes of God.