The voice of weeping shall be no more heard (comp. Revelation 21:4). The reasons there given are satisfactory: "There shall be no more death, neither sorrow … neither shall there be any more pain." But these reasons scarcely apply here.
For Isaiah's "new Jerusalem" is not without death (verse 20), nor without sorrow, since it is not without sin (verse 20), nor, as there is death there, is it without pain. Isaiah's picture, according to Delitzsch, represents the millennial state, not the final condition of the redeemed; but this trait—the absence of all weeping—can only be literally true of the final state.