In the world of the spirit there are no borders, the absence of borders is what is truly spiritual. A mystic today can feel a mystic from any past, whether from his tradition or another, as a true brother. The author of Devotion arrives at this conclusion, as simple as it is universal, in his version of The Russian Pilgrim, a classic of Orthodox Christianity and devotional literature, as well as in the main lessons for self-knowledge that he draws from his study, where he goes so far as to declare: "This is the book that I would have liked to have found when I was twenty years old." After the extraordinary reception of his last titles, this new work by Pablo d'Ors is born with the unequivocal vocation of definitively transforming its readers.