the nations: God’s promise to Abraham comes true (Genesis 12:3; see Isaiah 2:3).
In Revelation, the kings of the world often represent God’s enemies (Revelation 6:15; 17:18; 18:3, 9). Now that these enemies are destroyed (Revelation 16:9, 11; 19:1–2, 19–21), the image is of God’s glory shown in those who have repented (Revelation 14:6–7; compare 11:13) and walk with God (5:9; 15:4).
The gates that are never closed contrast with ancient times when closed gates protected cities from enemies, especially at night. The people experience peace and security under God’s rule (see Isaiah 60:11). God’s enemies are gone, and fear and failure have ended (see Zechariah 14:7; John 11:8–10; 12:35–36).