Mysticism is not just a phenomenon of the past, but has been alive and flourishing in Chistianity, Judaism, and Islam over the past century, as well as in many of the other religious traditions. Best understood as a search for the transforming presence of God, the mystical tradition has necessarily undergone changes and developments as it has confronted modernity and its frequently anti-religious stance. Making use of ten exemplary mystics of the 20th century, including Catholic, Protestants, and Jews, this book argues for the continued importance of mysticism in the modern world and studies its ongoing transformations.