Studies the original vocabulary of Frithjof Schuon its relevance to comparative religion and the status of metaphysical and theological terms in religion.This book explores the work of the religious philosopher Frithjof Schuon 19071998 by focusing on the way he develops his own expansive adaptations of traditional religious terms. As a leading proponent of perennial philosophical and religious thought Schuon borrows widely from specific religious traditions expanding the scope of traditional terminologyfrom upaya and yinyang to quintessential Sufism and vertical Trinitybeyond their respective traditional definitions. This is one of Schuons strengths as a thinker but it can also be an obstacle to understanding his writings. This study develops the full implications of these key terms by first delving into their specific traditional denotations and secondly exploring their universal connotations in Schuons universe of meaning. Such a task is particularly timely when both hardened religious identities and skepticism or hostility toward religious traditions increasingly clash with each other. The current questions and challenges surrounding crosscivilizational relations make such a contribution particularly needed and likely to receive a broader attention in the years to come.