'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.

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

3624. THE CORRESPONDENCE WITH THE GRAND MAN, WHICH IS HEAVEN, OF ALL THE ORGANS AND LIMBS, BOTH INTERIOR AND EXTERIOR, OF THE HUMAN BEING

Let me now tell of and describe marvels which, so far as I know, have not as yet been known to anyone, nor has even the idea of them entered anyone's head - the marvel that the whole of heaven has been formed in such a way that it corresponds to the Lord, to His Divine Human; also the marvel that the human being has been formed in such a way that every single part of him corresponds to heaven, and through heaven to the Lord. This is a great mystery which is now to be revealed, it being the subject here and at the ends of chapters that follow this.