A certain woman named Lydia, from the town of Thyatira, who sold purple cloth [for a living], was there. She was a worshiper of God and when she heard us [telling about salvation through Christ], the Lord opened her heart to respond to the message being spoken by Paul.
And [in addition], we know that the Son of God has come [in a physical body, See 4:2] and has given us understanding, so that we can know the True One [i.e., God], and that we are in [fellowship with] the True One, even His Son Jesus Christ. This Son is the true God and eternal life.
to open their eyes [to the truth] so they will turn from darkness to light and from the power [i.e., the influence] of Satan to God. [Then] they can receive the forgiveness of sins and the inheritance [of never ending life], along with [all] those who are set apart [for God] by trusting in Me.’
So, it says, “You who are asleep, wake up and rise from the dead, and Christ will shine on you [i.e., illuminate you].” [Note: The foregoing words may have been an early saying, used at someone’s immersion, which included the ideas of “rising up” (See Col. 2:12) and “illumination” (See Heb. 6:4) ].
Then the two men said to each other, “Were not our hearts stirred up within us [i.e., our emotions thrilled] when Jesus spoke to us along the road and opened up the Scriptures [to our understanding]?”
“And write [this] to the angel of the church at Philadelphia: These are the words of Him who is holy and true, [and] who possesses the key [i.e., the power and authority] of King David, [and] who opens [a door] which no one will close, and who closes one that no one will open: