Considered by Ratzinger devotees as his greatest work on the Liturgy, this profound and beautifully written treatment of the "great prayer of the Church" will help readers rediscover the Liturgy in all its hidden spiritual wealth and transcendent grandeur as the very center of our Christian life. In his own foreward to the book, Cardinal Ratzinger compares this work to a much earlier classic of the same title by Romano Guardini because Ratzinger feels that his insights here are similar with what Guardini achieved in his time regarding a renewed understanding of the Liturgy.