“Venerable Mary of Egypt, an illiterate woman who lived in the Jordan desert for almost half a century knew the Scripture by heart, which was witnessed by her first and last visitor, Abba Zosimus. How is this possible for a mortal man? It is not. This was explained by the Lord Jesus, though, when He said, ‘What is impossible for men is possible with God.’ Everything is possible with God. Because of the righteousness and faithfulness of Joshua the son of Nun, God stopped the Sun over Gabaon until Israel was victorious in the battle. Who taught the desert-dwelling Mary the Holy Scripture? The Spirit of God did just as the Savior had promised His disciples, “The Comforter, the Holy Spirit whom Father will send in my name. He will teach you all things.” He taught blessed Mary, having come to dwell in her and having deified her. And she did other miracles also, not of herself but of God who dwelt in her.”
 
– ‘Missionary Letters Vol 3’