True.. no denomination is the whole church.. the RCC is indeed a denomination.. The Eastern Orthodox are also a denomination.. as are the so-called "reformed".. The Lords table is an excuse for all manner of heretics to get together and put up with each other, pure genius really, absolute pure genius..
Even the christian cults are members of "the Church".. John ch 10 indicates Jesus said "my sheep hear MY voice".. not the voice of the hireling..
For Jesus is the gate of the sheep pen, its not Jesus fault certain sheep are afraid to come out of the sheep pen.. What sheep pen?.. Oh! there are many.. That think sheep in a different sheep pen(other than their pen) are heretics.. I left the sheep pen long ago.. but I have nothing against those in the "pens".. Actually thats where they NEED to be..
ONLY scripture can be trusted.. with the Holy Spirits help.. for thats WHY Jesus left the Holy Spirit in charge.. not the hireling.. Not scripture only but scripture plus the Holy Spirit.. The Holy Spirit is watching all of us.. sheep pen or not.. Sin against the Holy Spirit is sin indeed.. be careful..
The perimeter of the Church is her sacraments. One must be baptised, do penance, and receive the Holy Eucharist to be saved. Those in non-sacramental communities of faith knowingly refuse the most important function of the Church; it is illogical for them to claim to belong to her.