Only God Can Change a Heart
Paul and his companions had wandered 300 miles, seemingly for nothing. Doors were being closed. However, God was working and was about to work even more amazingly in somebody's life. He is not interested in outward religion but with a heart change as seen with Lydia. She was a worshipper but her heart was closed to God. Only God can open a heart. Lydia's life is immediately changed.
The video of the entire service including recorded Hebron congregational singing can be viewed here.