'The Church is only one, and this one true Church is
the congregation of men bound together by the profession of the same
Christian Faith, and by the communion of the same Sacraments, under the
rule of the legitimate pastors and especially under the one Vicar of
Christ on earth, the Roman Pontiff. From this definition, it can easily
be ascertained which men belong to the Church and which do not. For
there are three parts to this definition: 1) the profession of the true
Faith, 2) the communion of the Sacraments, 3) and subjection to the
legitimate Pastor, the Pope. By reason of the first part, all infidels
are excluded, as well as those who have never been in the Church, such
as Jews, Mohammedans, and pagans, and such as have been in the Church
but fallen away, such as heretics and apostates. By reason of the second
part, catechumens and excommunicates are excluded, because the former
are not to be admitted to the communion of the Sacraments and the latter
have been cut off from them. By reason of the third part, schismatics
are excluded, who have faith and sacraments, but are not subject to the
lawful Pastor, the Roman Pontiff; therefore, they profess faith and
receive Sacraments outside the Church.'
