Jonathan Littell said this quote

I was finally beginning to perceive that no matter how many dead people I might see, or people at the instant of their death, I would never manage to grasp death, that very moment, precisely in itself. It was one thing or the other: either you are dead, and then in any case there's nothing else to understand, or else you are not yet dead, and in that case, even with the rifle at the back of your head or the rope around your neck, death remains incomprehensible, a pure abstraction, this absurd idea that I, the only living person in the world, could disappear. Dying, we may already be dead, but we never die, that moment never comes, or rather it never stops coming, there it is, it's coming, and then it's still coming, and then it's already over, without ever having come.