Exactly what it says on the tin.
We can go to their services and take communion with them, something we cannot do with anyone else.
At present, they do not believe that they are permitted to take communion with us, but that may change.
You are, aware of the distinction between a schismatic and a heretic? They are the former, not the latter.
Never in the history of the Church were Catholics allowed to “go to their services and take communion with them”. I don’t even think it is allowed today by Rome. If it is, it is a novelty and is condemned by all of the Church’s 1900+ years. Simply put, you are not even allowed to enter a non-Catholic church except for funerals and weddings, and you can’t participate in the liturgy or prayers.
Solemn Pronouncements from Dogmatic Counsels, and Papal Encyclicals:
III Council of Constantinople, 680
If any ecclesiastic or layman shall go into the synagogue of the Jews or the meeting-houses of the heretics to join in prayer with them, let them be deposed and deprived of communion. If any bishop or priest or deacon shall join in prayer with heretics, let him be suspended from communion.
Council of Carthage, 418
One must neither pray nor sing psalms with heretics, and whosoever shall communicate with those who are cut off from the communion of the church, whether clergy or layman; let him be excommunicated.
Code of Canon Law, 1917
#1258 - 1. It is not permitted at all for the faithful to assist in any active manner at or to have any part in the worship of non-Catholics.
Excerps from “Mortalium Animos”, Encyclical of Pope Pius XI, On Religious Unity, January 6, 1928.
2. A similar object is aimed at by some, in those matters which concern the New Law promulgated by Christ our Lord. For since they hold it for certain that men destitute of all religious sense are very rarely to be found, they seem to have founded on that belief a hope that the nations, although they differ among themselves in certain religious matters, will without much difficulty come to agree as brethren in professing certain doctrines, which form as it were a common basis of the spiritual life. For which reason conventions, meetings and addresses are frequently arranged by these persons, at which a large number of listeners are present, and at which all without distinction are invited to join in the discussion, both infidels of every kind, and Christians, even those who have unhappily
fallen away from Christ or who with obstinacy and pertinacity deny His divine nature and mission. Certainly such attempts can nowise be approved by Catholics, founded as they are on that false opinion which considers all religions to be more or less good and praiseworthy, since they all in different ways manifest and signify that sense which is inborn in us all, and by which we are led to God and to the obedient acknowledgment of His rule. Not only are those who hold this opinion in error and deceived, but also in distorting the idea of true religion they reject it, and little by little. turn aside to naturalism andatheism, as it is called; from which it clearly follows that one who supports those who hold these theories and attempt to realize them, is altogether abandoning the divinely revealed
religion.
3. But some are more easily deceived by the outward appearance of good when there is question of fostering unity among all Christians.
4. Is it not right, it is often repeated, indeed, even consonant with duty, that all who invoke the name of Christ should abstain from mutual reproaches and at long last be united in mutual charity? Who would dare to say that he loved Christ, unless he worked with all his might to carry out the desires of Him, Who asked His Father that His disciples might be “one”[1]. And did not the same Christ will that His disciples should be marked out and distinguished from others by this characteristic, namely that they loved one another: “By this shall all men know that you are my disciples, if you have love one for another”[2]? All Christians, they add, should be as “one”: for then they would be much more powerful in driving out the pest of irreligion, which like a serpent daily creeps further and becomes more widely spread, and prepares to rob the Gospel of its strength. These things and others that class of men who are known as pan-Christians continually repeat and amplify; and these men, so far from being quite few and scattered, have increased to the dimensions of an entire class, and have grouped themselves into widely spread societies, most of which are directed by non-Catholics, although they are imbued with varying doctrines concerning the things of faith. This undertaking is so actively promoted as in many places to win for itself the adhesion of a number of citizens, and it even takes possession of the minds of very many Catholics and allures them with the hope of bringing about such a union as would be agreeable to the desires of Holy Mother Church, who has indeed nothing more at heart than to recall her erring sons and to lead them back to her bosom. But in reality beneath these enticing words and blandishments lies hid a mostgrave error, by which the foundations of the Catholic faith are completely destroyed.
5. Admonished, therefore, by the consciousness of Our Apostolic office that We should not permit the flock of the Lord to be cheated by dangerous fallacies, We invoke, Venerable Brethren, your zeal in avoiding this evil; for We are confident that by the writings and words of each one of you the people will more easily get to know and understand those principles and arguments which We are about to set forth, and from which Catholics will learn how they are to think and act when there is question of those schemes which have for their end the union in one body, whatsoever be the manner, of all who call themselves Christians.
8. This being so, it is clear that the Apostolic See cannot on any terms take part in their assemblies, nor is it anyway lawful for Catholics either to support or to work for such enterprises; for if they do so they will be giving countenance to a false Christianity, quite alien to the one Church of Christ.
9. These pan-Christians who turn their minds to uniting the churches seem, indeed, to pursue the noblest of ideas in promoting charity among all Christians: nevertheless how does it happen that this charity tends to injure faith? Everyone knows that John himself, the Apostle of love, who seems to reveal in his Gospel the secrets of the Sacred Heart of Jesus, and who never ceased to impress on the memories of his followers the new commandment “Love one another,” altogether forbade any intercourse with those who professed a mutilated and corrupt version of Christ’s teaching: “If any man come to you and bring not this doctrine, receive him not into the house nor say to him: God speed you”[18]. For which reason, since charity is based on a complete and sincere faith, the
disciples of Christ must be united principally by the bond of one faith.
10. So, Venerable Brethren, it is clear why this Apostolic See has never allowed its subjects to take part in the assemblies of non-Catholics: for the union of Christians can only be promoted by promoting the return to the one true Church of Christ of those who are separated from it, for in the past they have unhappily left it. To the one true Church of Christ, we say, which is visible to all, and which is to remain, according to the will of its Author, exactly the same as He instituted it.
2. A similar object is aimed at by some, in those matters which concern the New Law promulgated by Christ our Lord. For since they hold it for certain that men destitute of all religious sense are very rarely to be found, they seem to have founded on that belief a hope that the nations, although they differ among themselves in certain religious matters, will without much difficulty come to agree as brethren in professing certain doctrines, which form as it were a common basis of the spiritual life. For which reason conventions, meetings and addresses are frequently arranged by these persons, at which a large number of listeners are present, and at which all without distinction are invited to join in the discussion, both infidels of every kind, and Christians, even those who have unhappily fallen away from Christ or who with obstinacy and pertinacity deny His divine nature and mission. Certainly such attempts can nowise be approved by Catholics, founded as they are on that false opinion which considers all religions to be more or less good and praiseworthy, since they all in different ways manifest and signify that sense which is inborn in us all, and by which we are led to God and to the obedient acknowledgment of His rule. Not only are those who hold this opinion in error and deceived, but also in distorting the idea of true religion they reject it, and little by little. turn aside to naturalism andatheism, as it is called; from which it clearly follows that one who supports those who hold these theories and attempt to realize them, is altogether abandoning the divinely revealed religion.
3. But some are more easily deceived by the outward appearance of good when there is question of fostering unity among all Christians. 4. Is it not right, it is often repeated, indeed, even consonant with duty, that all who invoke the name of Christ should abstain from mutual reproaches and at long last be united in mutual charity? Who would dare to say that he loved Christ, unless he worked with all his might to carry out the desires of Him, Who asked His Father that His disciples might be "one"[1]. And did not the same Christ will that His disciples should be marked out and distinguished from others by this characteristic, namely that they loved one another: "By this shall all men know that you are my disciples, if you have love one for another"[2]? All Christians, they add, should be as "one": for then they would be much more powerful in driving out the pest of irreligion, which like a serpent daily creeps further and becomes more widely spread, and prepares to rob the Gospel of its strength. These things and others that class of men who are known as pan-Christians continually repeat and amplify; and these men, so far from being quite few and scattered, have increased to the dimensions of an entire class, and have grouped themselves into widely spread societies, most of which are directed by non-Catholics, although they are imbued with varying doctrines concerning the things of faith. This undertaking is so actively promoted as in many places to win for itself the adhesion of a number of citizens, and it even takes possession of the minds of very many Catholics and allures them with the hope of bringing about such a union as would be agreeable to the desires of Holy Mother Church, who has indeed nothing more at heart than to recall her erring sons and to lead them back to her bosom. But in reality beneath these enticing words and blandishments lies hid a mostgrave error, by which the foundations of the Catholic faith are completely destroyed.
5. Admonished, therefore, by the consciousness of Our Apostolic office that We should not permit the flock of the Lord to be cheated by dangerous fallacies, We invoke, Venerable Brethren, your zeal in avoiding this evil; for We are confident that by the writings and words of each one of you the people will more easily get to know and understand those principles and arguments which We are about to set forth, and from which Catholics will learn how they are to think and act when there is question of those schemes which have for their end the union in one body, whatsoever be the manner, of all who call themselves Christians.
8. This being so, it is clear that the Apostolic See cannot on any terms take part in their assemblies, nor is it anyway lawful for Catholics either to support or to work for such enterprises; for if they do so they will be giving countenance to a false Christianity, quite alien to the one Church of Christ.
9. These pan-Christians who turn their minds to uniting the churches seem, indeed, to pursue the noblest of ideas in promoting charity among all Christians: nevertheless how does it happen that this charity tends to injure faith? Everyone knows that John himself, the Apostle of love, who seems to reveal in his Gospel the secrets of the Sacred Heart of Jesus, and who never ceased to impress on the memories of his followers the new commandment "Love one another," altogether forbade any intercourse with those who professed a mutilated and corrupt version of Christ's teaching: "If any man come to you and bring not this doctrine, receive him not into the house nor say to him: God speed you"[18]. For which reason, since charity is based on a complete and sincere faith, the disciples of Christ must be united principally by the bond of one faith. 10. So, Venerable Brethren, it is clear why this Apostolic See has never allowed its subjects to take part in the assemblies of non-Catholics: for the union of Christians can only be promoted by promoting the return to the one true Church of Christ of those who are separated from it, for in the past they have unhappily left it. To the one true Church of Christ, we say, which is visible to all, and which is to remain, according to the will of its Author, exactly the same as He instituted it. Encyclical Quanta Cura-Syllabus of Errors Pope Pius IX ERRORS Condemned III. INDIFFERENTISM, LATITUDINARIANISM 15. Every man is free to embrace and profess that religion which, guided by the light of reason, he shall consider true. -- Allocution "Maxima quidem," June 9, 1862; Damnatio "Multiplices inter," June 10, 1851. (ERROR) 16. Man may, in the observance of any religion whatever, find the way of eternal salvation, and arrive at eternal salvation. -- Encyclical "Qui pluribus," Nov. 9, 1846. (ERROR) 17. Good hope at least is to be entertained of the eternal salvation of all those who are not at all in the true Church of Christ. -- Encyclical "Quanto conficiamur," Aug. 10, 1863, etc. (ERROR) 18. Protestantism is nothing more than another form of the same true Christian religion, in which form it is given to please God equally as in the Catholic Church. -- Encyclical "Noscitis," Dec. 8, 1849. (ERROR) BIBLICAL REFERENCES: 14 Bear not the yoke with unbelievers. For what participation hath justice with injustice? Or what fellowship hath light with darkness? 15 And what concord hath Christ with Belial? Or what part hath the faithful with the unbeliever? 16 And what agreement hath the temple of God with idols? For you are the temple of the living God: as God saith: I will dwell in them and walk among them. And I will be their God: and they shall be my people. 17 Wherefore: Go out from among them and be ye separate, saith the Lord, and touch not the unclean thing: (2Cor 6) 6 Let no man deceive you with vain words. For because of these things cometh the anger of God upon the children of unbelief. 7 Be ye not therefore partakers with them. 8 For you were heretofore darkness, but now light in the Lord. Walk then as children of the light. 11 And have no fellowship with the unfruitful works of darkness: but rather reprove them. 12 For the things that are done by them in secret, it is a shame even to speak of. (Eph 5) 20 But the things which the heathens sacrifice, they sacrifice to devils and not to God. And I would not that you should be made partakers with devils. 21 You cannot drink the chalice of the Lord and the chalice of devils: you cannot be partakers of the table of the Lord and of the table of devils. (1Cor 10) 1 Now the Spirit manifestly saith that in the last times some shall depart from the faith, giving heed to spirits of error and doctrines of devils, (1Tim 4) OTHER REFERENCES As Catholics live among those who are of false religions, and often have the most intimate connections with them, they naturally and laudable contract a love and affection for them. This makes them at first unwillingly to think that their friends are out of the way of salvation, then they proceed to wish and hope that they may be saved, then they call into question that that is so. In this, they grab at every pretext to persuade themselves that their friends can be saved in their own religion. It has become the fashion to think and believe that an uncovenanted mercy is to be found in God for Jews, Mohamedans, and those of false religions. Fashion is a powerful persuasive against which even good people are not always immune. When a Catholic hears these liberal sentiments every day resounding in his ears, and anything that seems contrary to them, ridiculed and condemned. He eventually yields to the delusion. The real reason that Catholics adopt this loose way of thinking, is that they are ignorant of the grounds of their religion, they don't examine the matter thoroughly, and once they are infected by the spirit of the day, they become unwilling to examine any further. They even get angry if any zealous friend should attempt to undeceive them. Grasping at the false reasoning that favors this loose way of thinking, they refuse to open their mind to the truth. - Orestes Brownson (1803-1876), Brownson's Quarterly Review ( American born, former New England Transcendentalist and colleague of Channing, Emerson, and Hawthorne. Published Brownson's Quarterly Review from his conversion to Catholicism in 1844, until within three years of his death.)
2. A similar object is aimed at by some, in those matters which concern the New Law promulgated by Christ our Lord. For since they hold it for certain that men destitute of all religious sense are very rarely to be found, they seem to have founded on that belief a hope that the nations, although they differ among themselves in certain religious matters, will without much difficulty come to agree as brethren in professing certain doctrines, which form as it were a common basis of the spiritual life. For which reason conventions, meetings and addresses are frequently arranged by these persons, at which a large number of listeners are present, and at which all without distinction are invited to join in the discussion, both infidels of every kind, and Christians, even those who have unhappily fallen away from Christ or who with obstinacy and pertinacity deny His divine nature and mission. Certainly such attempts can nowise be approved by Catholics, founded as they are on that false opinion which considers all religions to be more or less good and praiseworthy, since they all in different ways manifest and signify that sense which is inborn in us all, and by which we are led to God and to the obedient acknowledgment of His rule. Not only are those who hold this opinion in error and deceived, but also in distorting the idea of true religion they reject it, and little by little. turn aside to naturalism andatheism, as it is called; from which it clearly follows that one who supports those who hold these theories and attempt to realize them, is altogether abandoning the divinely revealed religion.
3. But some are more easily deceived by the outward appearance of good when there is question of fostering unity among all Christians. 4. Is it not right, it is often repeated, indeed, even consonant with duty, that all who invoke the name of Christ should abstain from mutual reproaches and at long last be united in mutual charity? Who would dare to say that he loved Christ, unless he worked with all his might to carry out the desires of Him, Who asked His Father that His disciples might be "one"[1]. And did not the same Christ will that His disciples should be marked out and distinguished from others by this characteristic, namely that they loved one another: "By this shall all men know that you are my disciples, if you have love one for another"[2]? All Christians, they add, should be as "one": for then they would be much more powerful in driving out the pest of irreligion, which like a serpent daily creeps further and becomes more widely spread, and prepares to rob the Gospel of its strength. These things and others that class of men who are known as pan-Christians continually repeat and amplify; and these men, so far from being quite few and scattered, have increased to the dimensions of an entire class, and have grouped themselves into widely spread societies, most of which are directed by non-Catholics, although they are imbued with varying doctrines concerning the things of faith. This undertaking is so actively promoted as in many places to win for itself the adhesion of a number of citizens, and it even takes possession of the minds of very many Catholics and allures them with the hope of bringing about such a union as would be agreeable to the desires of Holy Mother Church, who has indeed nothing more at heart than to recall her erring sons and to lead them back to her bosom. But in reality beneath these enticing words and blandishments lies hid a mostgrave error, by which the foundations of the Catholic faith are completely destroyed.
5. Admonished, therefore, by the consciousness of Our Apostolic office that We should not permit the flock of the Lord to be cheated by dangerous fallacies, We invoke, Venerable Brethren, your zeal in avoiding this evil; for We are confident that by the writings and words of each one of you the people will more easily get to know and understand those principles and arguments which We are about to set forth, and from which Catholics will learn how they are to think and act when there is question of those schemes which have for their end the union in one body, whatsoever be the manner, of all who call themselves Christians.
8. This being so, it is clear that the Apostolic See cannot on any terms take part in their assemblies, nor is it anyway lawful for Catholics either to support or to work for such enterprises; for if they do so they will be giving countenance to a false Christianity, quite alien to the one Church of Christ.
9. These pan-Christians who turn their minds to uniting the churches seem, indeed, to pursue the noblest of ideas in promoting charity among all Christians: nevertheless how does it happen that this charity tends to injure faith? Everyone knows that John himself, the Apostle of love, who seems to reveal in his Gospel the secrets of the Sacred Heart of Jesus, and who never ceased to impress on the memories of his followers the new commandment "Love one another," altogether forbade any intercourse with those who professed a mutilated and corrupt version of Christ's teaching: "If any man come to you and bring not this doctrine, receive him not into the house nor say to him: God speed you"[18]. For which reason, since charity is based on a complete and sincere faith, the disciples of Christ must be united principally by the bond of one faith. 10. So, Venerable Brethren, it is clear why this Apostolic See has never allowed its subjects to take part in the assemblies of non-Catholics: for the union of Christians can only be promoted by promoting the return to the one true Church of Christ of those who are separated from it, for in the past they have unhappily left it. To the one true Church of Christ, we say, which is visible to all, and which is to remain, according to the will of its Author, exactly the same as He instituted it.