From the 7th Ecumenical Council on the ‘Sunday of Orthodoxy’…

“Since this is the case, following the royal path and the teaching divinely inspired by our holy Fathers and the Tradition of the catholic Church—for we know that it is inspired by the Holy Spirit who lives in it—we decide in all correctness and after a thorough examination that, just as the holy and vivifying Cross, similarly the holy and precious Icons painted with colors, made with little stones or with any other matter serving this purpose should be placed in the holy churches of God, on vases and sacred vestments, on walls and boards, in houses and on roads, whether these are Icons of our Lord God and Savior, Jesus Christ, or of our spotless Sovereign Lady, the holy Mother of God, or of the holy angels and of holy and venerable men. For each time that we see their representation in an image, each time, while gazing upon them, we are made to remember the prototypes [i.e. the person who the icon represents], we grow to love them more, and we are more induced to worship them by kissing them and by witnessing our veneration not the true adoration (latreian) which, according to our faith, is proper only to the one divine nature, but in the same way as we venerate the image of the precious and vivifying cross, the holy Gospel and other sacred objects which we honor with incense and candles according to the pious custom of our forefathers. For the honor rendered to the image goes to its prototype, and the person who venerates an Icon venerates the person represented in it. Indeed, such is the teaching of our holy Fathers and the Tradition of the holy catholic Church which propagated the Gospel from one end of the earth to the other.”