Advent and Communion (part 3): "We have an altar..."

“On the Lord’s own day gather together and break bread [cf. Acts 2:42] and give thanks, having first confessed your sins so that your sacrifice may be pure. But let no one who has a quarrel with a companion join you until they have been reconciled, so that your sacrifice may not be defiled. For this is the sacrifice concerning which the Lord said, “In every place and time offer me a pure sacrifice, for I am a great king, says the Lord, and my name is marvelous among the nations” (Didache, 14)