I remember once reading a book about Bible prophecy wherein the author said that sinners during the millennium will receive immediate punishment when they sin. Is this Scriptural?
Some commentators have come to this conclusion from Isaiah 65:20. They interpret the portion that says, “He who dies at a hundred (years) will be thought a mere youth; he who fails to reach a hundred will be considered accursed” to mean that at least some sins will be punished with immediate death.
Others say that the lives of habitual sinners will be limited to 100 years. Reading this passage in the King James can lead one to this second conclusion.
Personally, I believe Isaiah 65:20 is telling us that infant mortality will be a thing of the past, and that an adult of 100 years will still be thought of as a youth. This will be due to the return of long life spans that humans enjoyed in the days before the flood. These extended life spans will be so prevalent that someone who fails to reach 100 will be thought to have been cursed somehow.