Frithjof Schuon (1907-1998) is the foremost representative of the “Traditionalist” or “Perennialist” school of comparative religious thought. This new edition of Logic and Transcendence, his most important philosophical work, is a fully revised translation from the French original and contains an extensive Appendix with previously unpublished selections from Schuon’s letters and other private writings. Logic and Transcendence contains chapters devoted to specifically philosophical questions such as the contradiction of relativism, the notion of the concrete and abstract, and the limitations of rationalism; it also contains some of Schuon’s most succinct theological discussions concerning both Christian and Islamic theology. The last part of the book turns to diverse questions of the spiritual life, including a discussion of the function of the spiritual master and concludes with a study of man and certitude.