Rav Moshe's Psak Moves The Vatican

A story was told by Rabbi Dr. Abraham J Twersky, the famed Rabbi, author and therapist, who was a world renowned substance abuse expert. He tells that one of his patients, a Catholic priest, expressed his consternation that he would no longer be able to take communion, which involves drinking wine. Rabbi Twersky asked him why he didn’t use grape juice, explaining that Rav Moshe Feinstein had ruled that Jewish law allowed grape juice to be substituted for wine. The priest asked his bishop who in turn asked the cardinal. The cardinal asked Rabbi Twersky to put the halachic rationale in writing, which he then forwarded to the Vatican. The psak came back – they agreed with the reasoning and would permit using grape juice as sacrament, based on Rav Moshe’s psak!