Mere Christianity, in The Complete C. S. Lewis Signature Classics

p. 47

Christianity says that every individual human being is going to live forever.  Notice an important implication.  “If individuals live only seventy years, then a state, or a nation, or a civilization, which may last for a thousand years, is more important than an individual.  But if Christianity is true, then the individual is not only more important but incomparably more important, for he is everlasting and the life of a state or a civilization, compared with his, is only a moment.”