I don't know. I was stating a historically verifiable fact that one Church existed (and it wasn't the "Roman" Catholic Church, but the catholc and aposotlic Church, both Latin and Greek), not whether you are saved or acceptable to God if you are not in it.
Let me put it another way ...
Roman Catholic theologians define The Church as “a body of men united together by the profession of the same Christian Faith, and by participation in the same sacraments, under the governance of lawful pastors, more especially of the Roman Pontiff, the sole vicar of Christ on earth.”
If I do not place myself under the governance of the Roman Pontiff, does that disqualify me from being a member of the Christ’s Church (i.e., the communion of saints, the society founded by Our Lord Jesus Christ)?