The Didache, from the Greek for "teaching", is one of the earliest Christian writings outside the New Testament. Its fuller title is The Lord's Teaching Through the Twelve Apostles to the Nations. It is a handbook, not a letter or a story: short instructions for how a Christian community lives, prays and gathers.
It opens with the Two Ways: "There are two ways, one of life and one of death; but a great difference between the two ways." The way of life is love of God and neighbour, and the chapters that follow set out what that means in daily conduct.
Then it turns to the Church's life. Baptism is given in the name of the Father, the Son and the Holy Spirit, in "living", running, water if it can be had. Christians fast on Wednesday and Friday and pray the Lord's Prayer three times a day. It gives prayers of thanksgiving over the cup and the bread, tells the faithful to gather on the Lord's Day, and asks them to appoint bishops and deacons worthy of the Lord. It ends with a call to watchfulness before the Lord's coming.
The Didache was known and valued in the early Church, then lost for centuries. Metropolitan Philotheos Bryennios found it in 1873 in a Greek manuscript copied in 1056, and published it in 1883. Its Wednesday and Friday fast is still kept by the Orthodox Church today.

