Subsistit in ("subsists in") is a Latin phrase which appears in Lumen gentium,[1] the document on the church from the Second Vatican Council of the Catholic Church. Since the council, the reason for use of the term "subsists in" rather than simply "is" has been disputed. Generally, those who see little or no change in church teaching in Vatican II insist on the equivalence of subsistit in and "is". Those who point to a new, ecumenical thrust in Vatican II insist that the term was introduced as a compromise after much discussion, and acknowledges new elements in the council's teaching.
The context of the statement is (emphasis added):
This is a debate about externals, the institutional integrity of a church, the fullness of the means of salvation.[2]
The correct meaning of "subsists in" has important implications for how the Catholic Church views itself and its relations with other Christian communities and other religions. Questions have been raised about whether Lumen gentium altered the longstanding phrase according to which the Church of Christ is (Latin est) the Catholic Church.[3]
Mystici corporis Christi states: "this true Church of Jesus Christ" and "the Mystical Body of Christ" is "the One, Holy, Catholic, Apostolic and Roman Church".[4] This position was later reaffirmed in Humani generis.[5]
Lumen gentium does recognize that other Christian ecclesial communities have elements of sanctification and of truth. And the Council used the traditional term "Church"— in the sense of "particular Church" and not "universal Church"— to refer to the Eastern Churches not in full communion with the Catholic Church. "These Churches", it says, "although separated from us, yet possess true sacraments and above all, by apostolic succession, the priesthood and the Eucharist, whereby they are linked with us in closest intimacy".
The Catholic Church used both the "subsists in" and "is" formula in the Second Vatican Council, stating in the Decree on the Eastern Churches: "The Holy Catholic Church, which is the Mystical Body of Christ, is made up of the faithful who are organically united in the Holy Spirit by the same faith, the same sacraments and the same government".
Both before and after the 16th century Protestant Reformation, Catholic theology identified the Church of Christ with the Catholic Church. This continued through the teaching of popes Pius XI and Pius XII. At the Second Vatican Council, the preparatory draft for the Decree on the Church contained this long-held teaching, following Pius XII in identifying the Mystical Body of Christ with the Catholic Church.[2]
The American ecclesiologist Joseph A. Komonchak chronicles this discussion of this teaching at the Council. According to him, the Council's Doctrinal Commission explained the change in the final draft of Lumen gentium from "is" to "subsists in", "so that the expression may better accord with the affirmation about ecclesial elements which are present elsewhere". Komonchak points out that since "some wanted to strengthen the statement, others to weaken it" the Doctrinal Commission of Vatican II decided to stay with the change of verb. He suggests that following "the first rule of conciliar hermeneutics", we should examine statements of Vatican II about these "ecclesial elements" found outside the Catholic Church. He mentions that the same document, Lumen gentium, preferred to speak of those "fully incorporated" into the church and avoided the term "membership", though without explaining why. It mentioned that "several elements of sanctification and of truth are found outside its visible structure". Such elements or vestiges mentioned as "present elsewhere" include the influence of the Spirit, aids to salvation, a partial profession of faith, and sacraments. This is reinforced in the decree on ecumenism (Unitatis redintegratio) which says: "Very many, of the most significant elements and endowments that together go to build up and to give life to the Church itself can exist outside the visible boundaries of the Catholic Church: the written Word of God, the life of grace, faith, hope, and charity, with other interior gifts of the Holy Spirit, as well as visible elements [...] [and] not a few of the sacred actions of the Christian religion". The decree then says that only the Catholic Church possesses "the fullness of the means of salvation".[6]
Cardinal Walter Kasper has pointed out that, concerning the claim that the fullness of the Church of Christ resides in the Catholic Church, that this "does not refer to subjective holiness but to the sacramental and institutional means of salvation, the sacraments and the ministries."
Sebastian Tromp, a Dutch Jesuit, a Scholastic theologian and close to Pope Pius XII, is considered to have been the main though unacknowledged author of Mystici corporis Christi. As advisor to Cardinal Alfredo Ottaviani during Vatican II, Tromp was also, according to existing tape recordings and diaries, the father of "subsistit", which to his understanding of Latin did not mean anything new but indicated completeness.[7] But Francis A. Sullivan pointed out:[8]
In a 1985 notification on a book of Catholic priest Leonardo Boff, the Congregation for the Doctrine of the Faith stated:[9]