22 It is only logical, then, for us to follow the magisterium of the Church as a guiding star in carrying on our investigations into this mystery, for the Divine Redeemer has entrusted the safeguarding and the explanation of the written or transmitted word of God to her. And we are convinced that "whatever has been preached and believed throughout the whole Church with true Catholic faith since the days of antiquity is true, even if it not be subject to rational investigation, and even if it not be explained in words." (9)
Source: Mysterium Fidei (Vatican.va)