Primary Source“By this present Constitution, which will be valid henceforth, now, and forever, We order and enjoin that nothing must be added to Our recently published Missal, nothing omitted from it, nor anything whatsoever be changed within it.”Pope St. Pius V, Quo Primum, July 14, 1570
Confirmed 437 Years Later“What earlier generations held as sacred remains sacred and great for us too, and it cannot be all of a sudden entirely forbidden or even considered harmful. It behooves all of us to preserve the riches which have developed in the Church’s faith and prayer, and to give them their proper place.”Pope Benedict XVI, Letter to the Bishops, Summorum Pontificum, 2007
