“It is not permitted to be present at the sacred rites of infidels and heretics in such a way that you would be judged to be in communion with them” --St Alphonsus Liguori
“Active participation in the sacred things of a [non-Catholic] public cult is illicit, since it implies approval of the worship and a recognition of the sect.” – Fr. B. Merkelbach OP in his Summa Theologiæ Moralis
“[the] Apostolic See has never allowed its subjects to take part in the assemblies of non-Catholics.” --Pope Pius XI, Mortalium Animus
“In liturgical celebrations taking place in other Churches and ecclesial Communities, Catholics are encouraged to take part in the psalms, responses, hymns and common actions of the Church in which they are guests. If invited by their hosts, they may read a lesson or preach.” – DIRECTORY FOR THE APPLICATION OF PRINCIPLES AND NORMS ON ECUMENISM
“We encourage attendance at each other’s Eucharists, respecting the different disciplines of our churches. This is particularly appropriate during the Week of Prayer for Christian Unity and other festive occasions in the life of our local communities. This would provide opportunities for experiencing each other’s eucharistic life, thereby serving both to deepen our communion and our desire for full communion. While this would take the form of non-communicating attendance in each other’s churches, it would nonetheless initiate a renewed awareness of the value of spiritual communion. We commend the offering of a blessing which has become a regular practice in some places for those who may not receive holy communion.” – GROWING TOGETHER IN UNITY AND MISSION: Building on 40 years of Anglican – Roman Catholic Dialogue
These are just a few examples. How can we say that Catholic Teaching hasn’t changed? Or does this fall under the category of ‘discipline’ or whatever, which my change? And no, I’m not trying to start a fight. Just want (need) clarification.