Koinonia: The Fellowship That Cost Something (Acts 2:42)
We usually translate koinonia as "fellowship" and picture coffee after the service. Luke meant something with more weight on it.
Acts 2:42 English - ESV lists four things the first believers devoted themselves to: the apostles' teaching, the koinonia, the breaking of bread, and the prayers. The Greek word comes from koinos, "common, shared." In everyday Greek it described business partnerships, joint ownership, having a real stake in something together. James and John were koinonoi, partners, in the fishing business before they were apostles. Luke 5:10 English - ESV
So when Luke says the church devoted itself to the koinonia, he is not describing a warm feeling after worship. Two verses later he shows what it looked like: they had all things in common, selling Acts 2:44-45 English - ESV possessions and distributing the proceeds as any had need. The sharing of life came with a sharing of stuff. Paul later uses the same word for the offering he collected among Gentile churches for the poor in Jerusalem, a koinonia expressed in currency.
The early church did not grow because its programs were polished. It grew because ordinary people bound themselves to one another like business partners, with their time, their tables, and their bank accounts, and the city noticed.
Fellowship, in Acts, is not what happens around snacks. It is what happens when my resources stop being entirely mine.
Acts 2:42 English - ESV
Acts 2 Berean Standard Bible - Bob Souer
Fishermen with their catch in the sea. The fishing partnership that gave koinonia its everyday Greek meaning.