This sounds like you are saying here that if the priest does not believe that his actions (speaking the words of institution) along the power of the Holy Spirit bring about the real body and blood of Christ, then it doesn’t happen. Am I misunderstanding?
Jon
This is correct. If the priest has lost his faith in his apostolic authority to effect the bread and wine and no longer believes in Catholic dogmas concerning Eucharist then The Holy Spirit will not honor the priestly petition to effect the sacraments. The epiclesis (“calling down from on high”) is not a magic incantation or anything like that but rather an authoritative invocation of the Holy Spirit. The priest loses His authority to invoke the Holy Spirit if he has lost his faith. While the words are spoken authoritatively they are also spoken in the context of Divine permission which we expect to be denied for cases of lost faith (sadly to the loss of the rest of the congregation - why such a priest must ethically step down and try to restore his faith). As an aside a priest who is not in a state of grace (grave sin) but has the faith in priestly powers and the Eucharist can effect the sacraments since it is the sacerdotal authority of the office and the subscription to the faith (proper intent) and proper matter and form that are essential.
*
Implicit Epiclesis
Bless and approve our offering;
make it acceptable to you,
an offering in spirit and in truth.
Let it become for us
the body and blood of Jesus Christ,
your only Son, our Lord.
Pre and post-consecration - 4 optional variations
II: Let your Spirit come upon these gifts to make them holy,
so that they may become for us
the body and blood of our Lord, Jesus Christ.
III: And so, Father, we bring you these gifts.
We ask you to make them holy by the power of your Spirit,
that they may become the body and blood
of your Son, our Lord Jesus Christ,
at whose command we celebrate this eucharist.
IV: Father, may this Holy Spirit sanctify these offerings.
Let them become the body and blood of Jesus Christ our Lord
as we celebrate the great mystery
which he left us as an everlasting covenant.
II: May all of us who share in the body and blood of Christ
be brought together in unity by the Holy Spirit.
III: Look with favour on your Church’s offering,
and see the Victim whose death has reconciled us to yourself.
Grant that we, who are nourished by his body and blood,
may be filled with his Holy Spirit,
and become one body, one spirit in Christ.
IV: Lord, look upon this sacrifice which you have given to your Church;
and by your Holy Spirit, gather all who share this one bread and one cup
into the one body of Christ, a living sacrifice of praise.
BF