'The first resurrection,' mentioned in Revelation 20:5, 6, does not mean a first resurrection, but the essence and primary part of resurrection, which is salvation and eternal life. There is only one resurrection to life. A second does not happen, and is not mentioned anywhere in the Bible.

(Referenties: Apocalypse Explained 6; Apocalypse Revealed 851; Revelation 20:5-6)

568. Having seven heads. This symbolizes the irrationality resulting from their absolute falsities, like the seven heads of the dragon (no. 538).