'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)

2758. The truth that genuine conjugial love is heaven is represented in the kingdoms of nature, for nothing exists in the whole natural order which is not in some way representative of the Lord's kingdom in general, since the natural kingdom has its entire origin in the spiritual kingdom. That which is without an origin prior to itself is nothing, for nothing exists without connection from a cause and so from an end. That which is without such connection collapses in an instant and ceases to be anything. This then explains where the representatives of the Lord's kingdom within the kingdoms of nature have their origin. The truth that conjugial love is heaven is evident from the metamorphosis of caterpillars into pupae or chrysalises and then into creatures that fly. For when the time arrives for them to be wedded - which is when they shed their earthly form, or their caterpillar state - they are adorned with wings and become creatures that fly, at which point they are raised up into the air, which is their heaven. In the air they play together, make marriages, lay eggs, and are nourished by the juices from flowers. At that time also they exist in their beauty, for their wings are tinged with gold, silver, and other lovely shades. Such things as these are what the inclination to pair off in marriage produces among such insignificant and tiny creatures.