This second edition of Hans Urs von Balthasar’s book on Adrienne von Speyr is his personal introduction to the Swiss medical doctor, convert, and mystic, whose message and mission he believed to be vitally important for the Church. Von Balthasar was the spiritual director of von Speyr for almost thirty years as she progressed in the life of grace. She helped him to found the Community of Saint John, an international secular institute, and she wrote more than sixty books on various topics, including prayer, Scripture, sacraments, and saints, which continue to bear fruit for those seeking to deepen their understanding of Catholic spirituality and theology.This book contains three main sections. The first includes a short account of Adrienne’s life, which describes her childhood, conversion, and mission; an analysis of her most important theological concerns; and an overview of her published and unpublished works. The second is a collection of enlightening statements that Adrienne made about herself, which illuminate both her exterior and interior life. The third section contains prayers that she herself wrote, which best reveal her spirit.