Typically, mystery does not receive much attention in philosophy. Although Heidegger and other key philosophers have made a place for mystery in philosophy, many find such philosophizing suspect and unconvincing. As a general rule, contemporary philosophers have taken a different approach, and, thus, there has been very little discussion of mystery in philosophy. As a study of mystery in philosophy, this book is therefore somewhat unique. Moreover, it is also distinctive in the way it approaches the subject, tuning to an unpopular figure—Dionysius the Areopagite (c. 500)—in contemporary philosophy in effort to make connections between that form of thought and various claims and indications of mystery. Thus, the book is unconventional in terms of both its subject matter and its methodology.