'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.

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

4418. Those in hell are said to be in darkness, but they are said to be in darkness because they dwell in falsities. For just as light corresponds to truths so darkness corresponds to falsities; and those in hell dwell in an inferior light, as stated above, like the yellow light of burning coal and sulphur. This light is what 'darkness' is used to mean, for their understanding is dependent on the light and therefore the sight this gives them, since that darkness and their understanding correspond to each other. The word darkness is used because light like this turns into darkness at the approach of heavenly light.