it comes under faith. Hence in so far as it comes under faith, it
cannot be false.

Reply Obj. 3: After Christ's birth, to believe in Him, was to believe
in Christ's birth at some time or other. The fixing of the time,
wherein some were deceived was not due to their faith, but to a human
conjecture. For it is possible for a believer to have a false opinion
through a human conjecture, but it is quite impossible for a false
opinion to be the outcome of faith.

Reply Obj. 4: The faith of the believer is not directed to such and
such accidents of bread, but to the fact that the true body of Christ
is under the appearances of sensible bread, when it is rightly
consecrated. Hence if it be not rightly consecrated, it does not
follow that anything false comes under faith.
_______________________

FOURTH ARTICLE [II-II, Q. 1, Art. 4]

Whether the Object of Faith Can Be Something Seen?

Objection 1: It would seem that the object of faith is something
seen. For Our Lord said to Thomas (John 20:29): "Because thou hast
seen Me, Thomas, thou hast believed." Therefore vision and faith
regard the same object.

Obj. 2: Further, the Apostle, while speaking of the knowledge of
faith, says (1 Cor. 13:12): "We see now through a glass in a dark
manner." Therefore what is believed is seen.