The purpose of this book is to invite you into the Sacred Heart of Jesus to experience his love, and to embrace the Divine Mercy of God that offers forgiveness and love to all who encounter it. We show how the Divine Mercy devotion is an extension and completion of the Sacred Heart devotion, and we draw parallels from the lives of St. Margaret Mary Alacoque and St. Faustina Kowalska to highlight many similarities in their lives and work.