Kronos - Immortality

“But the gods can’t die now, right? I mean, as long as Western civilization is alive, they’re alive. So . . . even if I failed, nothing could happen so bad it would mess up everything, right?”
Chiron gave me a melancholy smile. “No one knows how long the Age of the West will last, Percy. The gods are immortal, yes. But then, so were the Titans. They still exist, locked away in their various prisons, forced to endure endless pain and punishment, reduced in power, but still very much alive. May the Fates forbid that the gods should ever suffer such a doom, or that we should ever return to the darkness and chaos of the past. All we can do, child, is follow our destiny.”

***

The Lightning Thief, Chapter 10