sacrament it is not in virtue of their essence that accidents are not
in a subject, but through the Divine power sustaining them; and
consequently they do not cease to be accidents, because neither is
the definition of accident withdrawn from them, nor does the
definition of substance apply to them.

Reply Obj. 3: These accidents acquired individual being in the
substance of the bread and wine; and when this substance is changed
into the body and blood of Christ, they remain in that individuated
being which they possessed before, hence they are individual and
sensible.

Reply Obj. 4: These accidents had no being of their own nor other
accidents, so long as the substance of the bread and wine remained;
but their subjects had _such_ being through them, just as snow is
_white_ through whiteness. But after the consecration the accidents
which remain have being; hence they are compounded of existence and
essence, as was said of the angels, in the First Part (Q. 50, A. 2,
ad 3); and besides they have composition of quantitative parts.
_______________________

SECOND ARTICLE [III, Q. 77, Art. 2]

Whether in This Sacrament the Dimensive Quantity of the Bread or Wine
Is the Subject of the Other Accidents?

Objection 1: It seems that in this sacrament the dimensive quantity
of the bread or wine is not the subject of the other accidents. For
accident is not the subject of accident; because no form can be a
subject, since to be a subject is a property of matter. But dimensive
quantity is an accident. Therefore dimensive quantity cannot be the
subject of the other accidents.

Obj. 2: Further, just as quantity is individuated by substance, so
also are the other accidents. If, then, the dimensive quantity of the
bread or wine remains individuated according to the being it had
before, in which it is preserved, for like reason the other accidents
remain individuated according to the existence which they had before
in the substance. Therefore they are not in dimensive quantity as in
a subject, since every accident is individuated by its own subject.

Obj. 3: Further, among the other accidents that remain, of the bread
and wine, the senses perceive also rarity and density, which cannot
be in dimensive quantity existing outside matter; because a thing is
rare which has little matter under great dimensions, while a thing is
dense which has much matter under small dimensions, as is said in
_Phys._ iv. It does not seem, then, that di