Heaven on earth

"We knew not whether we were in heaven or on earth, for surely there is no such splendour or beauty anywhere upon earth. We cannot describe it to you: only this we know, that God dwells there among humans, and that their service surpasses the worship of all other places. For we cannot forget that beauty."

~Two emissaries of St. Vladimir, Prince of Kiev, after attending an Orthodox service at the Hagia Sophia in Constantinople. St. Vladimir and his people later converted to Orthodoxy. (Quoted in The Orthodox Church by Timothy [now Bishop Kallistos] Ware.)

"Let us who mystically represent the Cherubim and chant the trice-holy hymn to the life-creating Trinity now lay aside all earthly care."
~The Cherubic Hymn from the Orthodox liturgy

Pictures here and here.