No more shall there be in it
an infant who lives but a few days,
or an old man who does not fill out his days,
for the young man shall die a hundred years old,
and the sinner a hundred years old shall be accursed.

(Isaiah 65:20 ESV)

In anticipation of preaching through Isaiah 65:17-25 next Sunday, I provide this comment from Calvin:

Here it ought also to be observed, that blessings either of soul or body are found only in the kingdom of Christ, that is, in the Church, apart from which there is nothing but cursing. Hence it follows that all who have no share in that kingdom are wretched and unhappy; and, however fresh and vigorous they may appear to be, they are, nevertheless, in the sight of God, rotten and stinking corpses.

John Calvin, commentary on Isaiah 65:20