The second chapter of my dissertation deals with the Resonanztheorie of Hartmut Rosa. The chapter has two main parts. The first one is focused on the analyses of religious practices using the theoretical background of the theory of resonance. The second one develops the possible connection between the term unbelief and the Resonanztheorie. The main idea is that the framework of the theory of Resonanz can be an interesting tool to analyse the complexity of the phenomena related to unbelief as deconversion, blasphemy or atheism not only nowadays but also in other historical contexts. To conclude this paper, I introduce briefly the possibility of this study of unbelief considering the Resonanztheorie in antiquity, especially in Classical Athens.