Paul and Silas continue their ministry journey into Thessalonica. Their witness of the Gospel through the Old Testament and engaging with them through questions is a model for the attitude we need to bring towards evangelism.
You can't help how people respond to God's Word. You can only make them more or less reasonable for doing so.
There is no such thing as a Christian who isn't called to share the Gospel.
The more you share, the more you realize what you have.