The 15 Promises of the Rosary. 1. Those who faithfully serve me by the recitation of the Rosary shall receive signal graces. 2. I promise my special protection and the greatest graces to all those who shall recite the Rosary. 3. The Rosary shall be a powerful armor against hell. It will destroy vice, decrease sin, and defeat heresies. 4. The recitation of the Rosary will cause virtue and good works to flourish. It will obtain for souls the abundant mercy of God. It will withdraw the hearts of me