Finding elements of the Catholic Church in non Catholic Churches or other communities, doesn’t mean they are the Catholic Church.
As then Card Ratzinger explained
they don’t profess the Catholic faith in its entirety and have not preserved unity or communion under the successor of Peter"(72)
from
Communionis Notio , which you referred to,
- “The Church knows that she is joined in many ways to the baptized who are honoured by the name of Christian, but who do not however profess the Catholic faith in its entirety or have not preserved unity or communion under the successor of Peter”(72). Among the non-Catholic Churches and Christian communities, there are indeed to be found many elements of the Church of Christ, which allow us, amid joy and hope, to acknowledge the existence of a certain communion, albeit imperfect(73).
This communion exists especially with the Eastern orthodox Churches, which, though separated from the See of Peter, remain united to the Catholic Church by means of very close bonds, such as the apostolic succession and a valid Eucharist, and therefore merit the title of particular Churches(74). Indeed, “through the celebration of the Eucharist of the Lord in each of these Churches, the Church of God is built up and grows in stature”(75), for in every valid celebration of the Eucharist the one, holy, catholic and apostolic Church becomes truly present(76)."
Then Cardinal Ratzinger, continued
“Since, however, communion with the universal Church, represented by Peter’s Successor, is not an external complement to the particular Church, but one of its internal constituents, the situation of those venerable Christian communities also means that their existence as particular Churches is
wounded. The wound is even deeper in those ecclesial communities which have not retained the apostolic succession and a valid Eucharist. This in turn also injures the Catholic Church, called by the Lord to become for all
“one flock” with
“one shepherd”(77), in that it hinders the complete fulfilment of its universality in history. 18. This situation seriously calls for ecumenical commitment on the part of everyone, with a view to achieving full communion in the unity of the Church; that unity
“which Christ bestowed on his Church from the beginning. This unity, we believe, subsists in the Catholic Church as something she can never lose, and we hope that it will continue to increase until the end of time”(78)”…
I think you will agree, this document written by then Card Ratzinger, in 1992, is putting great effort at ecumenical outreach.
when he said “subsists” remember I gave this response #
488