Most Holy Rosary of the Blessed Virgin Mary

"If you say the Rosary faithfully until death, I do assure you that, in spite of the gravity of your sins 'you shall receive a never-fading crown of glory.' Even if you are on the brink of damnation, even if you have one foot in hell, even if you have sold your soul to the devil as sorcerers do who practise black magic, and even if you are a heretic as obstinate as a devil, sooner or later you will be converted and will amend your life and will save your soul, if-- and mark well what I say-- if you say the Holy Rosary devoutly every day until death for the purpose of knowing the truth and obtaining contrition and pardon for your sins."

-- St. Louis de Montfort from The Secret of the Rosary.

Instructions on the prayer of the Holy Rosary.
(Art: Fra Angelico, Period Vicchio di Mugello 1400-Rome 1455, Coronation of the Virgin, Tempera on wood, 112x114. Painted around 1435, it was mentioned by Vasari in his description of Sant'Egidio. At the Uffizi since 1948.)