"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