Monica,
The short answer (to the question “the consecration does not occur?”) is no. It does occur.
There are lots of different possibilities here. Please allow me to explain…
In order to consecrate, the priest must have the “intention to do as the Church does.” Therefore, a priest who says the words of consecration
without the intention to do as the Church does would not be consecrating. For example, a real priest who plays a priest in a movie (not recommended, but just an example).
Also:
If a priest has the specific intention “not to consecrate” then there is no consecration.
Again, the movie actor, or some other scenario where a preist (legitimately or not) has the specific intention not to consecrate–no consecration.
A priest who for some reason wants to deceive the congregation in church, and who goes through the Mass having the intention not to consecrate, then no consecration.
However:
A priest who has the intention to consecrate, even if he does not believe in Transubstantiation, still consecrates. Because his intention to do so (and the fact that he is doing as the Church does) is sufficient even if his belief is lacking.
A priest who does not believe in Transubstantiation but who has “the intention to do as the Church does” does consecrate. Because it’s not the personal belief (or lack of it) of the priest that matters. Even if he denies the possibility of consecration but still has the intention to do as the Church does, then there is a consecration.
Here’s a quote from
De Defectibus:
- The intention of consecrating is required. Therefore there is no consecration in the following cases: when a priest does not intend to consecrate but only to make a pretense; when some hosts remain on the altar forgotten by the priest, or when some part of the wine or some host is hidden, since the priest intends to consecrate only what is on the corporal; when a priest has eleven hosts before him and intends to consecrate only ten, without determining which ten he means to consecrate. On the other hand, if he thinks there are ten, but intends to consecrate all that he has before him, then all will be consecrated. For that reason every priest should always have such an intention, namely the intention of consecrating all the hosts that have been Placed on the corporal before him for consecration.
- If the priest thinks that he is holding one host but discovers after the Consecration that there were two hosts stuck together, he is to consume both when the time comes. If after receiving the Body and Blood, or even after the ablution, he finds other consecrated pieces, large or small, he is to consume them, because they belong to the same sacrifice.
- If, however, a whole consecrated host is left, he is to put it into the tabernacle with the others that are there; if this cannot be done, he is to consume it.
- It may be that the intention is not actual at the time of the Consecration because the priest lets his mind wander, yet is still virtual, since he has come to the altar intending to do what the Church does. In this case the Sacrament is valid. A priest should be careful, however, to make his intention actual also.
A priest
should have both the intention to “do as the Church does” and the intention to consecrate. If he has only the intention to do as the Church does, that is sufficient for consecration.