Reviewed by: Incomprehensible Certainty: Metaphysics and Hermeneutics of the Image by Thomas Pfau Thomas Zingelmann PFAU, Thomas. Incomprehensible Certainty: Metaphysics and Hermeneutics of the Image. Notre Dame, Ind.: University of Notre Dame Press, 2022. xxiii + 785 pp. Cloth, $80.00 Thomas Pfau reconstructs one of the most traditional and possibly most decisive philosophical debates, [End Page 559] namely, the one about the form and function of appearance (Schein). This debate is taken up on the basis of the concept of image. This means that Pfau concentrates historically as well as systematically on a specific topic within this debate. The book is divided into two major sections. In the first section, Pfau examines how the history of the metaphysics and theology of the image develops, starting with Plato in the first chapter. The basic idea in this section is that the image has a crucial epistemic role in the metaphysical and theological systems of the authors addressed. Here Pfau shows that Plato, at the latest in the Sophist, develops a theory of images that revalues appearance contrary to the assumptions in the Republic. Chapter 1 is about the mediation of unity and multiplicity, as it is also shown in Plotinus. Chapter 2 attempts to show how the Byzantine icon embodies the conviction that the invisible truth of the visual world can be revealed only through images. Pfau's demonstration of various epistemic dimensions of the image then begins with chapter 3: the eschatological vision from Augustine to Bonaventure to Julian of Norwich. Chapter 4, the last of the first section, reconstructs Nicholas of Cusa's position, which attempts to understand mystical visions mediated by images of Christ. The second section examines how the metaphysics of the image—in the sense of an epistemology, which tries to establish ultimate justifications—nevertheless persists and even evolves despite two crucial switches in philosophy. On the one hand, this concerns philosophy that subordinates the visual to the abstract (for example, Hegel) and, on the other, the supposedly nonmetaphysical status of the image in the developing natural sciences. Chapter 5 then attempts to show, through Goethe's botanical investigations and reflections, how, despite the establishment of the natural sciences, Goethe attempts to defend intuition as a scientific method and appearance as a scientific object of investigation. This position is then pursued historically in chapter 6, through the work of Lyell, Darwin, and Ruskin, where the visible is understood as the connecting point of the sciences in general. Gerard Manley Hopkins is then identified in chapter 7 as representing a position that combines theological with proto-phenomenological arguments to highlight the epistemic value of images. The last chapter then deals with decisive developments at the beginning of the twentieth century. In phenomenology (Husserl), painting (Cézanne), and poetry (Rilke), a conception develops that epistemically valorizes sensual and intuitive experience. Generally speaking, Pfau attempts to trace historically what arguments and positions have been developed on the relationship between image and knowledge. His work is based on the conviction that the image is the basis for human orientation in the world and is therefore of great epistemological value. Of outstanding importance for his question is that the epistemological value of images is not to be located in the properties of images, that is, an ontology of the image; rather, Pfau is interested in those positions that reflect on the relationship between knowledge and [End Page 560] experience of images. While clarifying the ontological status of images remains important, the epistemological status of images—what role the experience and usage of images has for humans—is in the foreground. Pfau reconstructs positions that hold that the pictorial is a medium of knowledge. He puts forward the thesis that there is a tradition that is of the opinion that in and through the medium of the image—and this closes the arc to the Schein-debate—being can be experienced by man. In other words, the invisible is to become recognizable through the visible. Of particular importance is his reading of the late Platonic dialogues: While appearance and being are still thought of as distinct in these dialogues, they are not opposed, in the sense of an epistemic opposition. Plato's...