'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)

162. Time in Heaven

Even though things keep happening in sequence and progressing in heaven the way they do in the world, still angels have no notion or concept of time and space. The lack is so complete that they simply do not know what time and space are. Here we will discuss time in heaven, leaving space to be discussed in its own chapter.