Details of Paul’s ministry in Ephesus are available in Acts 18:19–21 and Acts 19:1 – 20:1. It appears that over the years, Timothy (1 Timothy 1:3) as well as John himself laboured in this church. Many years have passed between the days of Paul and Timothy on the one hand and what Jesus Christ in this letter says concerning this church on the other. So little is known concerning the health of the church in Ephesus other than what we can distil from Jesus’ words in this letter.
1 “To the angel of the church in Ephesus write: ‘The words of him who holds the seven stars in his right hand, who walks among the seven golden lampstands.