Such as, in due course, St. John Paul the Great. How does that distinction come about?
It is likewise my understanding that the title “the Great” is awarded to a saint due to public acclaim. Therefore, it is not a title that is officially proclaimed by a pope as is the case with the title “Doctor of the Church.”
It is interesting to note that so far only two popes are called “great”:
Pope St. Leo the Great, and
Pope St. Gregory the Great. Although there is no official checklist for what makes a saintly pope considered “great”, St. Leo and St. Gregory share some common traits which I think set the bar for future papal candidates for this consideration.
For example, both St. Leo and St. Gregory made great contributions to theology (as a matter-of-fact, they are both Doctors of the Church). I personally believe that Pope Blessed John Paul II was a great theologian and I would not be surprised if he is also awarded the title Doctor of the Church at some future point. I’m not suggesting that a pope
has to actually be a Doctor of the Church in order to be called “great” (as a matter-of-fact, he may be called “great” before being called a doctor), but I think that the caliber of his theological contributions should be of “doctor quality.”
Both St. Leo and St. Gregory also made important contributions to the liturgy. For example, St. Leo wrote many Mass prayers which are still in use today. Gregorian Chant is named after St. Gregory, although it is debatable as to what sort of role (if any) he played in the development of chants. Nevertheless, he did a lot in terms of liturgical reform, and the same can be said of Pope Blessed John Paul II (who was responsible for implementing much of the Vatican II reforms).
Of course, both St. Leo and St. Gregory did a lot of great things aside from theology and the liturgy, as did Blessed John Paul II. For example, St. Leo talked Attila the Hun out of invading Rome, and Blessed John Paul II did a lot to end Communism in Europe. It is also worth noting that Blessed John Paul II is the most traveled pope in history, and his reign as pope is the second longest in history (and he was a hard-working pope until the day he died).
Based on what I have stated in this post, I think that Blessed John Paul II will one day be known as Pope St. John Paul the Great. He was certainly a pope who did many great things and completely gave his entire life in tireless service to God and the Church.