Replies

Here’s the Catholic Catechism of Pope St Pius X:

Those Outside the Communion of Saints

10 Q. Who are they who do not belong to the Communion of Saints?
A. Those who are damned do not belong to the Communion of Saints in the other life; and in this life those who belong neither to the body nor to the soul of the Church, that is, those who are in mortal sin, and who are outside the true Church.

11 Q. Who are they who are outside the true Church?
A. Outside the true Church are: Infidels, Jews, heretics, apostates, schismatics, and the excommunicated.

12 Q. Who are infidels?
A. Infidels are those who have not been baptised and do not believe in Jesus Christ, because they either believe in and worship false gods as idolaters do, or though admitting one true God, they do not believe in the Messiah, neither as already come in the Person of Jesus Christ, nor as to come; for instance, Mohammedans and the like.

13 Q. Who are the Jews?
A. The Jews are those who profess the Law of Moses; have not received baptism; and do not believe in Jesus Christ.

14 Q. Who are heretics?
A. Heretics are those of the baptised who obstinately refuse to believe some truth revealed by God and taught as an article of faith by the Catholic Church; for example, the Arians, the Nestorians and the various sects of Protestants.

15 Q. Who are apostates?
A. Apostates are those who abjure, or by some external act, deny the Catholic faith which they previously professed.

16 Q. Who are schismatics?
A. Schismatics are those Christians who, while not explicitly denying any dogma, yet voluntarily separate themselves from the Church of Jesus Christ, that is, from their lawful pastors.

17 Q. Who are the excommunicated?
A. The excommunicated are those who, because of grievous transgressions, are struck with excommunication by the Pope or their Bishop, and consequently are cut off as unworthy from the body of the Church, which, however, hopes for and desires their conversion.

18 Q. Should excommunication be dreaded?
A. Excommunication should be greatly dreaded, because it is the severest and most terrible punishment the Church can inflict upon her rebellious and obstinate children.

19 Q. Of what goods are the excommunicated deprived?
A. The excommunicated are deprived of public prayers, of the Sacraments, of indulgences and of Christian burial.

20 Q. Can we in any way help the excommunicated?
A. We can in some way help the excommunicated and all others who are outside the true Church, by salutary advice, by prayers and good works, begging God in His mercy to grant them the grace of being converted to the faith and of entering into the Communion of Saints.