How is the church to understand the Eucharist? Historically, the church has thought in terms of Christ’s sacrifice that atones or makes satisfaction for our sins. Today, many theologians hold that Christ’s death is primarily a self-gift, and they de-emphasize atonement or satisfaction. According to Michon M. Matthiesen, the early twentieth-century Jesuit Maurice de la Taille offered a theology that is relevant to this contemporary debate because it accounts for both the sacrifice and gift aspects of the Eucharist. De la Taille’s three-volume masterpiece, Mysterium Fidei, published in 1921, generated theological excitement and controversy. Some praised the work as a new theological method that overcame post-Tridentine immolationist Eucharistic theories of sacrifice. Others objected to his view of Trent and were offended by his mystical-theological synthesis. Sacrifice as Gift retrieves de la Taille’s magisterial thought, presenting him as an early nouvelle théologie thinker who recovered patristic and medieval insights that lost prominence after Trent. The volume also demonstrates his role in the liturgical movement in Europe. According to Matthiesen, de la Taille did not claim to offer a “new theory” about the sacrifice of the Mass. Rather, he carefully read the tradition, weaving “the voices of the pages”—from scripture and the Fathers (East and West), to the scholastics, and the mystics of the sixteenth through eighteenth centuries. This study captures the remarkably integrated nature of de la Taille’s thought on eucharistic sacrifice. Matthiesen argues that de la Taille’s theology of eucharistic sacrifice cannot be properly understood apart from his theology of grace and contemplative prayer. Besides providing a new appreciation of the depth of de la Taille’s theological contribution, Sacrifice as Gift is a timely presentation of a forgotten vision of eucharistic sacrifice, one that reconfigures the current philosophical and theological divide between sacrifice and gift.