e color or the savor of the bread or wine is slightly
modified; or on the part of the quantity, as when the bread or the
wine is divided into such parts as to keep in them the nature of bread
or of wine. But if the change be so great that the substance of the
bread or wine would have been corrupted, then Christ's body and blood
do not remain under this sacrament; and this either on the part of the
qualities, as when the color, savor, and other qualities of the bread
and wine are so altered as to be incompatible with the nature of bread
or of wine; or else on the part of the quantity, as, for instance, if
the bread be reduced to fine particles, or the wine divided into such
tiny drops that the species of bread or wine no longer remain.

Reply Obj. 1: Since it belongs essentially to corruption to take away
the being of a thing, in so far as the being of some form is in
matter, it results that by corruption the form is separated from the
matter. But if such being were not in matter, yet like such being as
is in matter, it could be taken away by corruption, even where there
is no matter; as takes place in this sacrament, as is evident from
what was said above.

Reply Obj. 2: Although the sacramental species are forms not in
matter, yet they have the being which they had in matter.

Reply Obj. 3: This corruption of species is not miraculous, but
natural; nevertheless, it presupposes the miracle which is wrought in
the consecration, namely, that those sacramental species retain
without a subject, the same being as they had in a subject; just as a
blind man, to whom sight is given miraculously, sees naturally.
_______________________

FIFTH ARTICLE [III, Q. 77, Art. 5]

Whether Anything Can Be Generated from the Sacramental Species?

Objection 1: It seems that nothing can be generated from the
sacramental species: because, whatever is generated, is generated out
of some matter: for nothing is generated out of nothing, although by
creation something is made out of nothing. But there is no matter
underlying the sacramental species except that of Christ's body, and
that body is incorruptible. Therefore it seems that nothing can be
generated from the sacramental species.

Obj. 2: Further, things which are not of the same genus cannot spring
from one another: thus a line is not made of whiteness. But accident
and substance differ generically. Therefore, since the sacramental
species are accidents, it seems that no substance