What form of thought forms the core of theological reflection? Is it about a consistent thinking that rigorously pursues an idea to its ultimate limit? Or is it about a radical thinking that dares to consider even the opposition or contradiction of itself? Boysen's insightful book sharpens this fundamental distinction derived from Walter Benjamin using the examples of the Christological doctrine of the two natures and the relationship between Judaism and Christianity. With this, the study aims to contribute to a new theological foundation and to a respectful relationship between these two truth-related religions.