Our neighbors had two young relatives came to stay with them a few weeks and they rang the doorbell almost every day so I taught them to sing gospel songs and asked them questions in between like "What are the five things we do in worship every Sunday?"
Another time they said they were Catholic and I said we must follow the Bible but the pope is nowhere in the Bible. I explained how every church managed itself with its own group of elders to lead it and we read the requirements for a good elder out of 1 Timothy 3.
Here they are singing gospel songs from memory as we walked to the university pond one day:
