In a concise and clear manner, Ingolf U. Dalferth presents the theological and philosophical approaches of hermeneutics from the last century. However, he does this not merely as a form of preserving monuments, but aims to advance the theology of the 21st century by building upon the work of Martin Heidegger and Rudolf Bultmann, without neglecting Karl Barth. The result of his conceptually precise intellectual effort is a radical theology that neither elevates the pre-modern era in an anti-modern way nor seeks a mystical deepening of the secular, but instead makes a radical shift into a theological perspective. While the sciences and philosophy are committed to the real, theology is concerned with the possible. Theology unfolds boundary concepts that critically limit the claims of science and philosophy and develops guiding concepts.