"Basilicae sine plebibus, plebes sine sacerdotibus, sacerdotes sine debita reverentia sunt, et sine Christo denique Christiani."
St. Bernard, Letter 317.1 to Alphonsus, Count of St. Gilles, concerning the heretic Henry, trans. Bruno Scott James (Letters of Saint Bernard of Clairvaux (Chicago: Henry Regnery Company, 1953), 388 (387-389)). Latin from PL 182, col. 434 (for now). 317.2:
Unhappy people! At the voice of one heretic you close your ears to all the Prophets and Apostles who with one Spirit of truth have brought together the Church out of all nations to one faith in Christ.