on about the same object can certainly be in different men," as
we have stated above about science and faith; yet it is possible for
one and the same man to have science and faith about the same thing
relatively, i.e. in relation to the object, but not in the same
respect. For it is possible for the same person, about one and the
same object, to know one thing and to think another: and, in like
manner, one may know by demonstration the unity of the Godhead, and,
by faith, the Trinity. On the other hand, in one and the same man,
about the same object, and in the same respect, science is
incompatible with either opinion or faith, yet for different reasons.
Because science is incompatible with opinion about the same object
simply, for the reason that science demands that its object should be
deemed impossible to be otherwise, whereas it is essential to
opinion, that its object should be deemed possible to be otherwise.
Yet that which is the object of faith, on account of the certainty of
faith, is also deemed impossible to be otherwise; and the reason why
science and faith cannot be about the same object and in the same
respect is because the object of science is something seen whereas
the object of faith is the unseen, as stated above.
_______________________

SIXTH ARTICLE [II-II, Q. 1, Art. 6]

Whether Those Things That Are of Faith Should Be Divided into Certain
Articles?

Objection 1: It would seem that those things that are of faith should
not be divided into certain articles. For all things contained in
Holy Writ are matters of faith. But these, by reason of their
multitude, cannot be reduced to a certain number. Therefore it seems
superfluous to distinguish certain articles of faith.

Obj. 2: Further, material differences can be multiplied indefinitely,
and therefore art should take no notice of them. Now the formal
aspect of the object of faith is one and indivisible, as stated above
(A. 1), viz. the First Truth, so that matters of faith cannot be
distinguished in respect of their formal object. Therefore no notice
should be taken of a material division of matters of faith into
articles.

Obj. 3: Further, it has been said by some [*Cf. William of Auxerre,
Summa Aurea] that "an article is an indivisible truth concerning God,
exacting [arctans] our belief." Now belief is a voluntary act, since,
as Augustine says (Tract. xxvi in Joan.), "no man believes against
his will." Therefore it seems that matters of fai