It is rare to have a scholar with such depth of knowledge in the ancient and vernacular languages of Europe, rarer to have such breadth of knowledge of Western intellectual history, and rarest to have both join forces to produce a work of this staggering erudition. With calm authority and elegant equipoise, Jiani Fan presents to us the grateful readers a masterclass on the genesis of modern intellectual thought. The “mask” that she exposes is that the disenchanted guise of modernity obscures its deep indebtedness to the ancient philosophies of Christianity, Stoicism, and Epicureanism.