I think the problem is easier than we think. The Church does not change dogma. She can restate, develop it further, add to existing explanations and even correct other explanations that she finds fall short, but the dogma itself remains the same.
In this case, the dogma of the Mystical Body remains the same, meaning that there is a Mystical Body of Christ Christ is the head.
Mystici Corpus Christi is not a dogmatic statement. It is a theological statement. The pope is trying to explain and answer some questions of his time.
Pope Benedict is trying to explain and answer similar questions with the understanding that we have today. If you would read Ut Unum Sint, you’ll find no contradictions with dogma. What you will find is a different understanding of Protestantism. In light of the current state of Protestantism, Cardinal Ratzinger and Pope John Paul II wrote Ut Unum Sint.
Pope Benedict has continued the work of Ut Unum Sint taking it one step further, which is what he did when he visited Martin Luther’s home a few months ago when he went to Germany. It was there that he made the famous statement that Protestantism today is a different phenomenon from what it was in the past. He also said that the Protestant who is born a Protestant is practicing faith, because this is the faith as he knows it and as it has been handed down to him. He’s not rebelling against anything.
While he was Prefect for the Congregation of the Faith he wrote that these communities are not devoid of truth and therefore are not completely separated from the Mystical Body, even though they exist outside of the physical boundaries of the Church. The reason being that their circumstances have changed. Pope John Paul approved this statement and it was added to the CCC and included in Ut Unum Sint. They also revised the canon dealing with heretics so that it only speaks about Catholics who deviate, not about Protestants. Protestants are not considered heretics, unless he’s a former Catholic. It’s one thing to be born a Protestant and another to leave the Catholic Church to become a Baptist.
How I deal with it is very simple. Mystici Corpus Christi was not a dogmatic decree. It was a theological statement about a dogma. The document did not change the dogma. There is still a Mystical Body. The document tried to answer questions that were pertinent to its day. Ut Unum Sin, is not a dogmatic statement either. It too is a theological statement about a dogma and it tries to answer questions that are being raised today.
Since the question that we’re dealing with today is, “What is the relationship of the Protestant communities to the Church?” I go with the answer this is being given for today.
Part of that answer also makes one big change that was not included in Mystici Corpus Christi. At the time that MCC was written, the thinking was that these were Protestant Churches. When Ut Unum Sint is written, the position of the Catholic Church has changed and it no longer accepts that the Protestants are churches. They are Reformation communities. Once you realize that they cannot be Churches, then you have to restate the same question that you did in 1947. Plus, you have to look at what has changed over those 60 years. There has been a great deal of change. We go with today’s statement, because it speaks about the situation as it is today, not yesterday or next century.
The example of same-sex marriage does not work here. That teaching comes from a moral doctrine that has been revealed. The content of MCC is not revealed truth. It is ABOUT a revealed truth. So are several other documents that followed it. That’s why St.Bonaventure called it the Theology of History and Bl John Henry Newman called it the Development of Christian Doctrine. As history moves forward, Truth remains the same, but situations change. As situations change, they help us understand more about the Truth that was always under our noses, like the seed and the tree. When holding the seed, the tree is right under your nose, but you can’t see it. That will happen with time.
This question about the relationship between the Protestants and the Mystical Body also becomes clearer with time, while the dogma of the Mystical Body remains the same – One body with Christ as its head.
I urge you to read Ut Unum Sin. It answers these questions better than I can. It’s well written and user friendly.
Fraternally,
Br. JR, OSF