It's against Catholic teaching for Catholics to pray with non-catholics and partake in non-catholic services.
Yes, certainly. As Miseremini said above:
"We are told to not pray with the unbeliever." From Matthew's AI:The Church's teaching on Catholics not praying with non-Catholics is rooted in historical docuмents and theological principles. Here are the key references:
1. Council of Laodicea (365 AD): Explicitly stated, "No one shall pray in common with heretics and schismatics." This decree underscores the prohibition against shared prayer with those outside the Church.
2. St. Cyril of Alexandria: Warned that associating with heretics is "unlawful, a profanation, and an act the punishment of which is death." This aligns with the Church’s stance on avoiding communion with those in schism or heresy.
3. Council of Carthage (5th century): Declared, "One must neither pray nor sing psalms with heretics," and warned that communion with excommunicated individuals leads to excommunication.
4. St. Thomas Aquinas: Asserted that the Church forbids communication with "unbelievers who have forsaken the faith" (heretics or apostates), emphasizing the danger of such associations.
5. Pope Pius XI’s Mortalium Animos (1937): Stated the Church’s refusal to permit participation in non-Catholic assemblies, framing unity as requiring return to the "one true Church of Christ."
6. "Communicatio in sacris": A theological principle stating that sharing in sacred rites (like prayer) with non-Catholics can be a mortal sin, though dispensations may be granted by bishops in exceptional cases.
These teachings reflect the Church’s emphasis on preserving doctrinal unity and avoiding practices that could compromise faith. While the text includes polemical claims (e.g., about "demon worshipers" or "Hindu beliefs"), the core answer rests on the cited historical and doctrinal sources.