'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)

286. Then I looked, and I heard the voice of many angels around the throne, the living creatures, and the elders. (5:11) This symbolizes a confession and glorification of the Lord by angels of the lower heavens.

It may be seen in no. 275 above that a confession and glorification of the Lord was made by angels of the three heavens - by angels of the higher heavens in verses 8 to 10, and so now by angels of the lower heavens in verses 11, 12. Thus the voice of the angels around the throne means a confession and glorification of the Lord by angels of the lower heavens.

John also saw then the living creatures and the elders along with the angels, because the living creatures and elders symbolize angels of the higher heavens (no. 275), and the lower heavens never act independently of the higher heavens, but conjointly with them. For the Lord flows in directly from Himself into all the heavens, thus also into the lower ones, but at the same time indirectly through the higher heavens into the lower ones.

This then is the reason that John first saw and heard the living creatures and elders by themselves, and afterward together with the angels.