The Millennium: Could you explain "The Millennium?" Has it already happened, and if so, when did it take place? [Revelation 20, Deuteronomy 7:9, 2 Thessalonians 1:8, Psalm 50:10-12, 2 Peter 3:8, Psalm 90:4, Psalm 84:10]. Spirits in Prison: Could you explain the passage about Jesus preaching to the "spirits in prison?" [1 Peter 3:20-21, 2 Peter 2:5, 1 Peter 1:10-12].