Pope Shenouda III
If the Virgin Mary is the Mother of Christ, then unquestionably, she is the spiritual mother of all Christians. It suffices that when the Lord Jesus Christ was on the cross, He said to St. John, the beloved Apostle, of her: "Behold your mother!" (John.19: 27) If the Virgin is mother to St. John who addresses us, saying: "My little children" (1John.2: 1), therefore she is the mother of us all. Consequently, the title "our sister" is not welcomed and does not deserve a reply because it is unacceptable and illogical to consider the mother of Christ the sister of His children who believe in His name!