May Catholics Pray With Non-Catholics?
In the old moral manuals, Catholics could occasionally pray with Protestants in private environments as long as these requirements were met: "It is not forbidden to pray or sing privately with heretics if the prayers or songs are not heretical and no scandal is given.”—Moral Theology #125 by Fr. Heribut Jone, OFM Cap, 1929. However, Catholics doing public or liturgical prayer with Protestants or other heretics has always been strictly forbidden. See the Anglican Vespers which took place at St. Peter's, p/c LifeSite News. The prohibition against Catholics praying publicly with heretics or infidels has been clearly outlined by Popes and Saints for nearly 2,000 years: “The Apostolic See has [...]