In this series of lectures delivered in the period immediately preceding World War II, Barth addresses the major topics of systematic theology. The reader gets a glimpse of the depth of Barth's thinking in these brief discourses, which he expanded upon greatly in his major work, 'Church Dogmatics.' In an Appendix, Barth answers question from the audience regarding the last essay. Contents 1. Revelation 2. The Church 3. Theology 4. The Ministry of the Word 5. The Christian as Witness Appendix