"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.