-time between every two signate instants in
connection with that change.

Some say therefore that the instant in which the bread was last, and
the instant in which the body of Christ is first, are indeed two in
comparison with the things measured, but are one comparatively to the
time measuring; as when two lines touch, there are two points on the
part of the two lines, but one point on the part of the place
containing them. But here there is no likeness, because instant and
time is not the intrinsic measure of particular movements, as a line
and point are of a body, but only the extrinsic measure, as place is
to bodies.

Hence others say that it is the same instant in fact, but another
according to reason. But according to this it would follow that
things really opposite would exist together; for diversity of reason
does not change a thing objectively.

And therefore it must be said that this change, as stated above, is
wrought by Christ's words which are spoken by the priest, so that the
last instant of pronouncing the words is the first instant in which
Christ's body is in the sacrament; and that the substance of the
bread is there during the whole preceding time. Of this time no
instant is to be taken as proximately preceding the last one, because
time is not made up of successive instants, as is proved in _Phys._
vi. And therefore a first instant can be assigned in which Christ's
body is present; but a last instant cannot be assigned in which the
substance of bread is there, but a last time can be assigned. And the
same holds good in natural changes, as is evident from the
Philosopher (Phys. viii).

Reply Obj. 2: In instantaneous changes a thing is "in becoming," and
is "in being" simultaneously; just as becoming illuminated and to be
actually illuminated are simultaneous: for in such, a thing is said
to be "in being" according as it now is; but to be "in becoming,"
according as it was not before.

Reply Obj. 3: As stated above (ad 1), this change comes about in the
last instant of the pronouncing of the words. For then the meaning of
the words is finished, which meaning is efficacious in the forms of
the sacraments. And therefore it does not follow that this change is
successive.
_______________________

EIGHTH ARTICLE [III, Q. 75, Art. 8]

Whether This Proposition Is False: "The Body of Christ Is Made Out of
Bread"?

Objection 1: It seems that this proposition is false: "The body of
Christ is made ou