William Burkitt on Revelation 22:15

Without, that is, without the gates of the city of the New Jerusalem, are all filthy and unclean sinners, all cruel and bloody persecutors, all raging and furious enemies to me and my people, all idolaters and all liars; these shall be shut out of heaven, as dogs are shut out of the house; and shut into hell, to be imprisoned with devils and damned spirits, and that everlastingly, to lie for ever in that mysterious fire, whose strange property it is always to torture, but never to kill, or always to kill but never to consume: they would die, but they cannot die; they seek for death, but cannot find it; they desire it, but it flies from them.