The Holy Rosary
The Holy Rosary is considered a perfect prayer because within it lies the awesome story of our salvation. With the Rosary in fact we meditate the mysteries of joy, of sorrow and the glory of Jesus and Mary. It's a simple prayer, humble so much like Mary. It's a prayer we can all say together with Her, the Mother of God. With the Hail Mary we invite Her to pray for us. Our Lady always grants our request. She joins Her prayer to ours. Therefore it becomes ever more useful, because what Mary asks She always receives, Jesus can never say no to whatever His Mother asks for.
Since the Rosary is composed, principally and in substance, of the prayer of Christ and the Angelic Salutation, that is, the Our Father and the Hail Mary, it was without doubt the first prayer and the principal devotion of the faithful and has been in use all through the centuries, from the time of the apostles and disciples down to the present.