If a pagan asks you to show him your faith, take him into church and place him before the icons.
John of DamascusTo serve Mary and to be her courtier is the greatest honor we can possibly possess; for to serve the Queen of Heaven is already to reign there; and to live under her command is more than to govern.
John of DamascusHe who does not believe according to the tradition of the Catholic Church is an unbeliever.
John of DamascusHow can this come about?" Mary asked. "The Holy Spirit will come upon you," the angel answered, "and the power of the Most High will cover you with its shadow." And now you are the one who puts the question: "How can bread become Christ and wine His Blood?" I answer: "The power of the Holy Spirit will be at work to give us a marvel which surpasses understanding.
John of DamascusThe whole earth is a living icon of the face of God. ... I do not worship matter. I worship the Creator of matter who became matter for my sake, who willed to take His abode in matter, who worked out my salvation through matter. Never will I cease honoring the matter which wrought my salvation! I honor it, but not as God. Because of this I salute all remaining matter with reverence, because God has filled it with his grace and power. Through it my salvation has come to me.
John of Damascus