"Life has value because it is finite. Immortality will bring you nothing but pain."
— Eluca, Chaos Rings
Zouken Matou: If there is a way to prolong your life and if it is within reach - humans are creatures that will obtain it, even at the cost of the world itself!
Ilyasviel von Einzbern: Then you're saying you'll sacrifice everyone else so you can stay alive?
Zouken Matou: Of course. I would gladly kill everyone in the world if that would grant my wish.
"Revenge is the prime ingredient in the fountain of youth. I've kept myself alive for hundreds of years with a steady diet of jealousy and hate, awaiting the day when I would finally eclipse your family's thieving reputation."
— Clockwerk, Sly Cooper
You and the rest of your kind take blind comfort in the belief that we are monsters, that you could never do what we did. The key ingredient in the anti-agapic cannot be synthesized. It must be taken from living beings. For one to live forever, another one must die. You will fall upon one another like wolves. It will make what we did pale by comparison. The billions who live forever will be a testimony to my work, and the billions that are murdered to provide that immortality will be the continuance of that work. That will be my monument!
— Jha'Dur, Babylon 5, "Deathwalker".
"You are not yet ready for immortality."
— Ambassador Kosh, Babylon 5 after destroying Jha'Dur and her formula.
...having been all but immortal from birth, never knowing vulnerability, far too many of them never developed notions of empathy or restraint, or found them far too late.
Eternal beauty has a cost, one which Shavronne was happy to pay with the lives of others.