en_tn_condensed/act/16/14.md

A certain woman named Lydia

"There was a woman named Lydia"

a seller of purple

"a merchant who sold purple cloth"

Thyatira

This is the name of a city.

worshiped God

A worshiper of God is a Gentile who gives praise to God and follows him, but does not obey all of the Jewish laws.

The Lord opened her heart to pay attention

"The Lord caused her to listen well and to believe"

opened her heart

Here "heart" stands for a person's mind. Also, the author speaks about the "heart" or "mind" as if it were a box that a person could open so it is ready for someone to fill it.