Chapter 18 — Part II: The Sacraments — The Holy Eucharist
Section 81. Teaching Of The Councils — Another means of ascertaining the belief of the holy Church on matters of faith is the condemnation of the contrary doctrine and opinion. It is manifest that belief in the Real Presence of the body of Christ in the holy Sacrament of the Eucharist was so spread and taught throughout the universal Church and unanimously professed by all the faithful, that when, five centuries ago, Berengarius presumed to deny this dogma, asserting that the Eucharist was only a sign, he was unanimously condemned in the Council of Vercelli, which Leo IX had immediately convoked, whereupon he himself anathematised his error.