faith was made public, is said secretly at Prime and Compline, as
though it were against the darkness of past and future errors.
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TENTH ARTICLE [II-II, Q. 1, Art. 10]

Whether It Belongs to the Sovereign Pontiff to Draw Up a Symbol of
Faith?

Objection 1: It would seem that it does not belong to the Sovereign
Pontiff to draw up a symbol of faith. For a new edition of the symbol
becomes necessary in order to explain the articles of faith, as
stated above (A. 9). Now, in the Old Testament, the articles of faith
were more and more explained as time went on, by reason of the truth
of faith becoming clearer through greater nearness to Christ, as
stated above (A. 7). Since then this reason ceased with the advent of
the New Law, there is no need for the articles of faith to be more
and more explicit. Therefore it does not seem to belong to the
authority of the Sovereign Pontiff to draw up a new edition of the
symbol.

Obj. 2: Further, no man has the power to do what is forbidden under
pain of anathema by the universal Church. Now it was forbidden under
pain of anathema by the universal Church, to make a new edition of
the symbol. For it is stated in the acts of the first* council of
Ephesus (P. ii, Act. 6) that "after the symbol of the Nicene council
had been read through, the holy synod decreed that it was unlawful to
utter, write or draw up any other creed, than that which was defined
by the Fathers assembled at Nicaea together with the Holy Ghost," and
this under pain of anathema. [*St. Thomas wrote 'first' (expunged by