What does Revelation 13:9 mean?

The invitation extended in this verse reminds us of a similar call given to the seven churches of Asia Minor (Revelation 2–3). This invitation, however, is addressed more broadly to all Christians as individuals, because the church will have been raptured to heaven before the tribulation. God always speaks to those who accept His invitation to listen (Matthew 11:15; Mark 4:9; Luke 8:8). During the tribulation, most of mankind will heed the dictates of the beast from the sea. A remnant of faithful believers will listen to and heed the Lord's voice.

In Revelation 18:4, The Lord's people will hear Him summon them to come out of Babylon. Although some believers may think it is wise to join heart and hands with the evil world system, Paul emphasized the importance of not letting the world conform us to its mold. He wrote: "Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect" (Romans 12:2).