Isaiah 65:20 - Coke's Commentary on the Holy Bible

There shall be no more thence an infant of days, &c.— No more shall there be an infant short-lived; nor an old man who hath not fulfilled his days: for he that dieth at an hundred years, shall die a boy; and the sinner that dieth at an hundred years shall be deemed accursed. Lowth. The prophet in this verse promises longevity as a necessary adjunct to the felicity of the state which he is describing; and as a proof of this longevity, he mentions, that he who shall die by any extraordinary cause, aged a hundred years, shall be thought to die a child; while the sinner, to be taken off by divine judgment, is not to be thought burdened with age, but punished for his crimes, though he be a hundred years old. Vitringa does not understand this passage in the letter, but metaphorically; as much as to say, "In this holy city, there shall be no violent or punitive death; but, all the inhabitants being holy, all shall die full of days and happy, and shall have, as it were, a foretaste, a pledge and earnest of life eternal, in their long and happy life below." See chap. Isaiah 25:8.