And here are some of the benefits of it:
… Conversion of those who do not have the faith
… Reconciliation to the Church for those who have lost/strayed from the faith
… Assurance of a happy death
… Strengthening of the faith for those already in the Church
… Protection from Satan for those who wear or promote the scapular
In 1840, Mary instructed Sister Bisqueyburu, in Paris, who was a Daughter of Charity of St. Vincent de Paul, to make the scapular. She wanted the sister to promote it. A picture of her and her immaculate heart is on the front. It was a token from her of her love and that she would pray for those who wore it, or carried it on them in her name. And the greater the trust the person had in her to obtain great graces for them, the more those graces would come.
So she asks that this beautiful gift from her be used and she would bring us the help we need. The prayer should be said everyday,
“Immaculate heart of Mary, pray for us now and at the hour of our death.”
The following is an explaination of how the Green Scapular works.
Exocism by an exocist is a sacramental not a sacrament.
The Green Scapular is a sacramental given by Mary as a gift to us.
Both sacramentals.
“However,” adds Fr. Amorth, an exorcist, “let us be clear on this: The Lord takes faith into account. Therefore, a simple prayer of a lay person, even though it is private, could be more efficacious than the prayer of anyone else.”
Father Amorth cites the example of Saint Catherine of Siena: When an exorcist could not liberate a demoniac, he would send the afflicted person to her. “Then the saint would pray and obtain liberation,” writes Amorth. “Her prayer was not an exorcism; she was neither an exorcist nor a priest. But she was a saint!”
As Father Amorth notes, it all comes down to faith: Christ Himself admonished His followers to cast out spirits, but He also pointed to a lack of faith as the reason they weren’t always able to succeed. It is faith that is our shield. It is our faith that unlocks the power of God – which readily overcomes all evil.
With the Green Scapular it also depends on faith of the one giving it or using it. To rely with trust that Mary will keep her word and she will protect those that wear it and obtain graces for them.