Paradosis or handing on or down of Divine Revelation is

affirmed in Sacred Scripture. Hence, it must be found in some

contiguous historical form from age to age. Catholic Christians

believe that the promise of the Spirit of Truth to guide believers

in truth is found in the constant faith of the Church as preserved

 in the writings of the Post-Apostolic Fathers.

The term "Post-Apostolic Fathers" is the name given by the

Christian Church to the writers who established Christian

doctrine before the 8th century. The writings of the Fathers

or Patristic Literature synthesized Christian doctrine as found

in the Bible, especially the gospels, the writings of the Apostolic

Fathers, ecclesiastical dictums, and decisions of the Church

councils.