When you control communication, you can hide anything you want. - John Scalzi

“Every creature has fear,” Jared said. “Even the non-conscious ones.”
“No,” Boutin said. “Every creature has a survival instinct. It looks like fear but it’s not the same thing. Fear isn’t the desire to avoid death or pain. Fear is rooted in the knowledge that what you recognize as yourself can cease to exist. Fear is existential.

The problem with aging is not that it’s one damn thing after another—it’s every damn thing, all at once, all the time.
You can’t stop aging. Gene therapies and replacement organs and plastic surgery give it a good fight. But it catches up with you anyway. Get a new lung, and your heart blows a valve. Get a new heart, and your liver swells up to the size of an inflatable kiddie pool. Change out your liver, a stroke gives you a whack. That’s aging’s trump card; they still can’t replace brains.

Rationality is not one of humanity’s strong points.