10. Hence, the new Missal, while bearing witness to the Roman Church’s rule of prayer (lex orandi), also safeguards the deposit of faith handed down by the more recent Councils and marks in its turn a step of great importance in liturgical tradition.
For, when the Fathers of the Second Vatican Council reaffirmed the dogmatic pronouncements of the Council of Trent, they spoke at a far different time in world history, and, for that reason, were able to bring forward proposals and measures regarding pastoral life that could not have even been foreseen four centuries earlier.
The “new Missal” spoken of here is the current Roman Missal, 3rd edition. And yes, the liturgy must be able to address the “new conditions” of the times and cultures of the world in which it is celebrated. The nature of the Gospel and of the evangelical mission demands nothing less.