Nathan Nithyananda in a letter to Ellopos says, “It has been quoted that community owes its origin to Greek philosophy of Koinonia. St Paul uses the term many times to instill this communitarian life style of Early Christianity. Are there specific areas, e.g. marriage, business relations, etc. and the reasons where this koinonia can be clearly identified in Greek culture before Christianity?”
As you may know the first Christian communities were speaking Greek even in Palestine. It was the ancient Greeks that accepted the new faith and spread the New Testament to East and West, transforming the Roman empire, so that an understanding of Christianity without knowing essential elements of the ancient Greek life is impossible.
Since we are talking about the Christian life as both referring to a faith and to the consequences of this faith to all sides of a people’s life, ancient Greek thinking has to be explored within the same reference – from religion to the whole life of a city – if we are to understand the links between the two phases of the history of Greek people.
Some modern thinkers, such as Cornelius Castoriadis, insist on the democratic element of the ancient Greek Polis (City), emphasizing the self-government of a people who manage city affairs in a way that would secure anyone’s pleasure with respect to each other’s needs and wishes.
We can call this a ‘secular’ and at any rate narrow view of the ancient Greek polis, although even thus the democratic substance of the Christian church itself, at least in the Greek East (Byzantium), becomes evident.
The word itself (Koinonia) can be traced back to the Lyric poetry (Archilochus), but the reality is already present in Homer, in the communication of Gods and men in the earth as their common habitation.