“…while faithfully preserving the Orthodox Faith, everyone must also take care to spread it among the non-Orthodox.  Christ the Savior said that having lit the candle, men do not put it under a bushel but on a candlestick so that it gives light to all.  The light of the Orthodox Faith has not been lit to shine only for a small circle of people.  No, the Orthodox Church is catholic;8  she remembers the commandment of her Founder, “Go ye into all the world and preach the Gospel to every creature and teach all nations” (Mark 16.15; Matt. 28.19).”
(St. Tikhon of Moscow, homily)

http://www.pravoslavie.ru/sas/image/102189/218988.b.jpg