" Almost the whole of modern medical research is dedicated to improving health in old age and extending the human life-span and we get more senility, not less. Extending it for what? We give them drugs to improve short-term memory, drugs to raise mood, drugs to increase appetite. They don’t need anything to make them sleep, that’s all they seem to do. What, I wonder, goes on in those senile minds during those long periods of half-consciousness. Memories, I suppose, prayers. "

― P.D. James , The Children of Men