During her final apparition at Fatima in October 1917, the Blessed Virgin Mary was dressed as Our Lady of Mt. Carmel, holding the brown scapular; she was obviously encouraging everyone to wear the garment of grace, just as she urged everyone to pray the rosary on a daily basis. 750 years before, Our Lady had given the scapular to St Simon Stock, telling him: "Whosoever shall die wearing this scapular shall not suffer eternal fire."
On July 13, 1917, Our Lady at Fatima showed the three little children the Vision of Hell; it was the first part of the controversial "Secret of Fatima," and in some ways, the most terrible aspect of it, for hell is a place where anyone can go if they break God's law and do not repent. The children were so frightened by the vision that afterwards all earthly sufferings seemed like nothing. I think someone once said that Our Lord in the Gospels warns His disciples about hell "where the worm dieth not, and the flame is not extinguished" (Mark 9 :44) more often than He promises them Heaven, "for straight is the way and narrow is the gate that leads to life, and few there are that find it." (Matthew 7:14)
Along with the scapular and rosary, Our Lady asked that we perform the duties of our state in life; she knew that in future times how difficult it would become to fulfill one's most basic obligations to God and to other people, and yet the fulfillment of those duties often is the difference between heaven and hell. Yet, as the saints testify, many have been saved because they clung to some small token of devotion to Our Lady in spite of everything, and the Mother of Mercy interceded for them. As the angel at Fatima instructed the three children to pray:
O my Jesus, forgive us our sins, save us from the fires of hell, lead all souls to heaven, especially those who are in most need of thy mercy!
Novena Prayer to Our Lady of Mt. Carmel:
O most beautiful Flower of Mt Carmel, fruitful vine, splendor of Heaven, Blessed Mother of the Son of God, Immaculate Virgin, assist me in this my necessity. O Star of the Sea, help me and show me herein you are my Mother.
O Holy Mary, Mother of God, Queen of Heaven and earth, I humbly beseech you from the bottom of my heart, to succor me in this my necessity, there are none that can withstand your power.
O show me herein you are my Mother.
Mary, conceived without sin, pray for us that have recourse to thee. (3 times)
Sweet Mother, I place this cause in your hands. (3 times) AMEN.