Devotion to the Sacred Heart is a powerful little booklet filled with many of the treasures to be found in the veneration of the Sacred Heart of Jesus. Besides containing an explanation of the symbolism found within the Image of the Sacred Heart, it also includes explanations of the 9 First Fridays devotion, known as The Great Promise, the miraculous cure of St. Gemma Galgani as well as many profound exhortations to offer reparation to the Sacred Heart.