The Glories of the Sacred Heart by Cardinal Manning is a theological work that explains devotion to the Sacred Heart of Jesus, grounding it in the dogma of the Incarnation and veneration of Christ's Sacred Humanity. Cardinal Manning affirms the close connection between devotion to the Sacred Heart and adoration of the Blessed Sacrament, as revealed to Saint Margaret Mary. It deepens devotion, enhances understanding of the faith, and encourages greater love for Christ.