[PDF] Rev. Salvany – What is Liberalism [St. Louis 1899]
Liberalism is a heresy in the doctrinal order, because heresy is the formal and obstinate denial of all Christian dogmas in general. It repudiates dogma altogether and substitutes opinion, whether that opinion be doctrinal or the negation of doctrine.
Consequently it denies every doctrine in particular. If we were to examine in detail all the doctrines or dogmas which, within the range of Liberalism, have been denied, we would find every Christian dogma in one way or the other rejected, from the dogma of the Incarnation to that of Infallibility.