Paul, Silas and Timothy had preached about Jesus in Thessalonica. That was during the second of Paul’s journeys. The story about this is recorded in Acts chapter 17.
Some Jews and many Gentiles believed the message about Jesus. They welcomed the good news with joy. They were like the seed that fell on good soil that Jesus talked about (Matthew 13:8 and 23).
The truth about Jesus wasn’t just words Paul spoke out loud. The truth came with the power of the Holy Spirit. This power changed the lives of the Thessalonian believers. They turned away from worshipping false gods. They grew strong in faith, love and hope. They became a model for other believers.