19And I will rejoice in Jerusalem, and joy in my people: and the voice of weeping shall be no more heard in her, nor the voice of crying. 20There shall be no more thence an infant of days, nor an old man that hath not filled his days: for the child shall die an hundred years old; but the sinner being an hundred years old shall be accursed. 21And they shall build houses, and inhabit them; and they shall plant vineyards, and eat the fruit of them. Verse 20 is the real focus of this. The professor of Eschatology I studied under said this verse dealt with the millenial reign. He said it meant if a person born in the Mil doesn't trust Christ by the time he is 100 years old then that person wouldbe put to death. The child shall die at 100 years old. The sinner will be a believer living in sin. How see you guys this verse? This is what he taught not saying I accept the teaching or not.