But Green returns to the most important way that…

““But Green returns to the most important way that Christianity spread — through the extended household (oikos) evangelism done informally by Christians. A person’s strongest relationships were within the household — with blood relatives, servants, clients, and friends — so when a person became a Christian, it was in the household that he or she would get the most serious hearing.8 If the head of the household (Greek, oikos) became a believer, the entire home became a ministry center in which the gospel was taught to all the household’s members and neighbors. We see this in Acts 16:15, 32–34 (Lydia’s and the jailer’s homes in Philippi); Acts 17:5 (Jason’s home in Thessalonica); Acts 18:7 (Titius Justus’s home in Corinth); Acts 21:8 (Philip’s home in Caesarea); and 1 Corinthians 1:16; 16:15 (Stephanas’s home in Corinth). The home could be used for systematic teaching and instruction (Acts 5:42), planned presentations of the gospel to friends and neighbors (Acts 10:22), prayer meetings (Acts 12:12), impromptu evangelistic gatherings (Acts 16:32), follow-up sessions with the inquirers (Acts 18:26), evenings devoted to instruction and prayer (Acts 20:7), and fellowship (Acts 21:7).””

— Timothy Keller