'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)

92. From these observations may also be seen what the internal man is and what the external man. Namely, the internal is what is called the spiritual man, and the external, what is called the natural man; also that the one is distinct from the other as heaven is from the world; and further, that all things that take place and come into existence in the external or natural man, take place and come into existence from the internal or spiritual.