'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)

7. It Is the Lord's Divine Nature That Makes Heaven

While we call the total assemblage of angels heaven because they do make it up, what really makes heaven overall and in every specific instance is the divine nature that emanates from the Lord, flowing into angels and accepted by them. The divine nature that emanates from the Lord is the good intrinsic to love and the truth intrinsic to faith. The amount angels accept from the Lord of what is good and what is true determines the extent to which they are angels and are heaven.