Trowitzsch unfolds the diverse influence of Karl Barth's theology on the modern age. Especially the new challenges of today require to contemplate newly the fundaments of our Christian belief: the revelation of God, gratitude, the Christian sermon. Trowitzsch applies Barth's theology critically on the present. The author sets off a dialogue between Barth's theology and philosophy, the arts and poetry of the modern age and of German or European origin achieving a diverse discussion.