body is in this sacrament.

Reply Obj. 1: Number follows division, and therefore so long as
quantity remains actually undivided, neither is the substance of any
thing several times under its proper dimensions, nor is Christ's body
several times under the dimensions of the bread; and consequently not
an infinite number of times, but just as many times as it is divided
into parts.

Reply Obj. 2: The determinate distance of parts in an organic body
is based upon its dimensive quantity; but the nature of substance
precedes even dimensive quantity. And since the conversion of the
substance of the bread is terminated at the substance of the body of
Christ, and since according to the manner of substance the body of
Christ is properly and directly in this sacrament; such distance of
parts is indeed in Christ's true body, which, however, is not
compared to this sacrament according to such distance, but according
to the manner of its substance, as stated above (A. 1, ad 3).

Reply Obj. 3: This argument is based on the nature of a body, arising
from dimensive quantity. But it was said above (ad 2) that Christ's
body is compared with this sacrament not by reason of dimensive
quantity, but by reason of its substance, as already stated.
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FOURTH ARTICLE [III, Q. 76, Art. 4]

Whether the Whole Dimensive Quantity of Christ's Body Is in This
Sacrament?

Objection 1: It seems that the whole dimensive quantity of Christ's
body is not in this sacrament. For it was said (A. 3) that Christ's
entire body is contained under every part of the consecrated host.
But no dimensive quantity is contained entirely in any whole, and in
its every part. Therefore it is impossible for the entire dimensive
quantity of Christ's body to be there.

Obj. 2: Further, it is impossible for two dimensive quantities to be
together, even though one be separate from its subject, and the other
in a natural body, as is clear from the Philosopher (Metaph. iii).
But the dimensive quantity of the bread remains in this sacrament, as
is evident to our senses. Consequently, the dimensive quantity of
Christ's body is not there.

Obj. 3: Further, if two unequal dimensive quantities be set side by
side, the greater will overlap the lesser. But the dimensive quantity
of Christ's body is considerably larger than the dimensive quantity
of the consecrated host according to every dimension. Therefore, if
the dimensive quantity of Christ's body be in