As is well known, the Prefect of the Congregation for the Doctrine of the Faith recently published the document
Mater populi fidelis. It states that “
it is always inappropriate to use the title ‘Co-redemptrix’ to define Mary’s cooperation” (n. 22, italics in the original). The reasons given in numbers 17-22, however, are quite inadequate. They are limited, in short, to affirming that Christ has a unique place in Redemption and that “reverent caution [is needed] whenever proposing any form of possible cooperation with him in the realm of Redemption” (n. 20). In other words, the core of the reasons is the denial that there is any participation in the redemptive work. Paragraph 22 gives another reason: “When an expression requires many, repeated explanations to prevent it from straying from a correct meaning, it does not serve the faith of the People of God and becomes
unhelpful.”