From that day on his entire life was devoted to the love of Our Lord in the Blessed Sacrament and to Our Lady, in particular the apostolate of the Scapular of Our Lady of Carmel Mount. He established an association whose mission was the exposition and nocturnal adoration of the Blessed Sacrament. He entered the order of Carmel on October 6, 1849, and received the habit under the name of Brother Augustine Mary of the Most Blessed Sacrament. Hermann aspired to a life completely hidden in God, but his Superiors sent him to travel throughout Europe to preach. He brought God back into the hearts of innumerable Jews, Protestants and nonbelievers. In 1868, he finally obtained permission from his superiors to withdraw into "solitude". However, he was struck by a new trial: an illness in his eyes. Placing his confidence in the Virgin of Lourdes, he made a novena in the grotto of the apparitions, washing his eyes every day at the miraculous spring. On the ninth day, he experienced a sudden and complete cure-it was an obvious miracle. He was the first Jew miraculously cured at Lourdes. In November 1870 he was sent as chaplain of the French prisoners in Berlin, where he contracted small pox administering Extreme Unction to prisoners. He died there in Berlin, a victim of his devotion and his immense charity. The evening of January 19, he made his confession peacefully, and received Holy Communion. His calm breathing continued until around 10 o'clock the next morning, when, as the nun who sat up with him sang the Salve Regina at his request, he gently expired.