Originally written in New Testament Greek, this is the earliest known hymn recorded outside of the Bible that is still in use today. Both Eastern and Western Churches use this hymn in daily worship. Find more information here.
O gracious Light, pure brightness of the ever-living Father in heaven, O Jesus Christ, holy and blessed! Now as we come to the setting of the sun, and our eyes behold the vesper light, we sing your praises, O God: Father, Son, and Holy Spirit. You are worthy at all times to be praised by happy voices, O Son of God, O Giver of life, and to be glorified through all the worlds.