The open books symbolize the record of their evil deeds, for which they are to be judged. And the "book of Life" is opened to symbolize that the names of those who are judged are not there recorded, and that consequently they are justly condemned. To "him that overcometh," the Saviour promised "I will not blot his name out of this book of life," 3:3.
The sea, death, and hell giving up their dead, indicates that all of the "rest of the dead" are here resurrected, and that none are left out from among whom these are raised, as these were, from whom came forth the subjects of the first resurrection.
The casting of death and hell into the lake of fire, symbolizes the casting in of those who were within their domains; and "the lake of fire," symbolizes the place into which--the impenitent are consigned--which is the "second death."
"And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and the sea was no more. And I saw the holy city, new Jerusalem, descending out of heaven, from God, prepared like a bride adorned for her husband." Rev. 21:1, 2.
The new heaven and new earth are symbols of the new order of things. The old heavens and earth having been dissolved, their elements melting with fervent heat (2 Pet. 3:12), the "new heavens and the new earth, wherein dwelleth righteousness," for which Peter looked, succeed to their place. So much more resplendent are these than the former, that those "shall not be remembered, nor come into mind," _i.e._, to be desired, Isa. 65:17. This is the eternal state in which we are commanded to be "glad and rejoice forever," when God shall "create Jerusalem a rejoicing, and her people a joy." Then "the voice of weeping shall be no more heard in her, nor the voice of crying." There "the elect shall long enjoy the work of their hands;" for "as the days of a tree, are the days of my people," saith the Lord; who has also declared that, "as the new heavens and the new earth, which I will make, shall remain before me, so shall your seed and your name remain," Isa. 66:22.
The sea is now "no more," in the same sense that the first heavens and earth are passed away--all having disappeared in the conflagration, and given place to the "restitution of all things spoken of by the mouth of all the holy prophets," Acts 3:21. Whether the new creation will comprise both sea and dry land, as was first created (Gen. 1:10), is not here decided; but there is no reason to suppose that this characteristic of the original creation will be forever obliterated.