(St. Louis Marie de Montfort)
Of all the ways of saying the Rosary, the most glorious to God, most salutary to our souls, and the most terrible to the devil is that of saying or chanting the Rosary publicly in two choirs.
God is very pleased to have people gathered together in prayer. All the angels and the blessed unite to praise him unceasingly. The just on earth, gathered together in various communities, pray in common, night and day. Our Lord expressly recommended this practice to his apostles and disciples, and promised that whenever there would be at least two or three gathered in his name he would be there in the midst of them (Matthew. 18:19).