Revelation 18:4

Come out, my people. Notice that God has people living in Babylon. God's people in all ages are commanded to come out of Babylon. (Compare Isaiah 48:20; Isaiah 52:11; Jeremiah 50:8; Jeremiah 51:54; Zechariah 2:7; 2 Corinthians 2:16-17.) Since Babylon is the World, as a center of seduction, God's people in all ages live right in the middle of it. To "come out" is to be pure from her sins. [Some have misunderstood this call to "come out," and dropped out of society and hidden themselves away. But the Apostles and early Christians did not do this. They continued to be an active part of society, working to turn people to Jesus Christ - which then "changes the world" for that person. "When anyone is joined to Christ he is a new being; the old is gone, the new has come" (2 Corinthians 5:17).