d above (Q. 80, A. 8).

Reply Obj. 5: Although the priest may not recollect having said some
of the words he ought to say, he ought not to be disturbed mentally
on that account; for a man who utters many words cannot recall to
mind all that he has said; unless perchance in uttering them he
adverts to something connected with the consecration; for so it is
impressed on the memory. Hence, if a man pays attention to what he is
saying, but without adverting to the fact that he is saying these
particular words, he remembers soon after that he has said them; for,
a thing is presented to the memory under the formality of the past
(De Mem. et Remin. i).

But if it seem to the priest that he has probably omitted some of the
words that are not necessary for the sacrament, I think that he ought
not to repeat them on that account, changing the order of the
sacrifice, but that he ought to proceed: but if he is certain that he
has left out any of those that are necessary for the sacrament,
namely, the form of the consecration, since the form of the
consecration is necessary for the sacrament, just as the matter is,
it seems that the same thing ought to be done as was stated above (ad
4) with regard to defect in the matter, namely, that he should begin
again with the form of the consecration, and repeat the other things
in order, lest the order of the sacrifice be altered.

Reply Obj. 6: The breaking of the consecrated host, and the putting
of only one part into the chalice, regards the mystical body, just as
the mixing with water signifies the people, and therefore the
omission of either of them causes no such imperfection in the
sacrifice, as calls for repetition regarding the celebration of this
sacrament.

Reply Obj. 7: According to the decree, _De Consecr.,_ dist. ii,
quoting a decree of Pope Pius I, "If from neglect any of the blood
falls upon a board which is fixed to the ground, let it be taken up
with the tongue, and let the board be scraped. But if it be not a
board, let the ground be scraped, and the scrapings burned, and the
ashes buried inside the altar and let the priest do penance for forty
days. But if a drop fall from the chalice on to the altar, let the
minister suck up the drop, and do penance during three days; if it
falls upon the altar cloth and penetrates to the second altar cloth,
let him do four days' penance; if it penetrates to the third, let him
do nine days' penance; if to the fourth, let him do twent