I think that there may be some legitimate saints outside of the visible Orthodox Church. St. Isaac of Nineveh, for example, was from the Persian (i.e. Nestorian) Church, right? And even St. Constantine the Great was baptized an Arian on his deathbed. I would hesitate to deny the sainthood of Mother Theresa. Or also that of St. Maria Goretti, a truly wonderful and Christ-like child. Here is her story:
The daughter of humble sharecroppers, Maria and her family moved to the little town of Ferriere, Italy in 1899 in search of work. Desperately seeking to support his family, Luigi Goretti struck up a bargain with Signor Serenelli, who had a son named Alessandro. The two families lived together in a building owned by Count Mazzolini.
Maria quickly matured in grace and holiness in the eyes of friends and other acquaintances. After losing her father to malaria, she developed great strength and maturity. Her charming modesty, cheerful obedience and the serious, but free acceptance of a hundred thankless home chores distinguished her from the other children who would play in the dusty streets of Ferriere. Perhaps the highlight of her life was her First Holy Communion, which she dutifully prepared for and awaited with great anticipation. She truly seemed to be advancing "in wisdom, and age and grace before God and men."
Lured by the passions of his day and nurturing the dark side of his soul with impious reading and thoughts, Alessandro Serenelli had been a thorn in lovely Maria's side. He propositioned her on several occasions and harassed her with impure suggestions. On July 5, 1902, he would be denied no longer. As she once again rebuffed his sexual advance, shouting, "No! It is a sin! God does not want it!", Alexander lunged to the deed, stabbing Maria 14 times.
Doctors in Nettuno tried to save Maria's life to no avail. After 20 painful hours of suffering during which she forgave and prayed for Alessandro, Maria entered Heaven fortified with the Last Sacraments. Her last earthly gaze rested upon a picture of the Blessed Mother. It was July 6, 1902.
Almost fifty years later on June 24, 1950, Pope Pius XII stood on the steps of St. Peter's in Rome and pronounced Maria Goretti a Saint and Martyr of the Universal Church to half a million people. He proposed her as the Patroness of Modern Youth and set July 6th as her feast Day. Her mother, and her murderer, attended the canonization ceremony together.
This was the triumph of the little girl who loved God and hated sin.
Maria Goretti had led a very ordinary life. But in spite of her simplicity, her great faith and love for God made her truly extraordinary.
Many recorded miracles, both spiritual and physical, have been worked through St. Maria Goretti's intercession. Worldwide, there are many places of devotion to St. Maria Goretti, such as the Sanctuary of Our Lady of Graces and St. Maria Goretti in Nettuno, Italy, pictured here.
I'm not sure of the official stance of the Orthodox Church on this matter, and I would certainly abide by whatever the Church felt was best, but I find this wonderful young girl's story to be very inspirational. Her greatest joy was to receive the Eucharist. The custom in her locale was for the little children to ask for something when they received their first Communion. The priest later asked each of them what they asked for. Some said bikes, or other material things, or to grow up to find a good husband, etc., but St. Maria Goretti said that all she asked for was to receive the Body and Blood of Christ again so that she could be one with Him. The priest was astounded, and allowed her to receive for three weeks straight, which apparently was very unusual for children in that part of Italy in those days.
Moreover, she demonstrated true Christianity in her terrible suffering. Even as she was enduring terrible torture on the operating table, with no anesthesia, the priest asked her if she forgave her attacker. She said yes, she wanted him to be with her in Heaven. She said that even through her terrible pain. Also, she begged for a glass of water, but couldn't have one because of her open stomach wounds. Thre priest told her that Our Lord Jesus didn't have any water while He was suffering, and she said, yes, I accept this, then I don't need any water either. Such words from a child? I don't think that I would have that holiness if I were in that situation. To my mind, this young lady has done her best to emulate Her Master, and is certainly a saint. I would have no problem asking for her intercession, especially for a child, unless my fathers the bishops told me it was wrong to do so.