Humanity does not pass through phases as a train passes through stations: being alive, it has the privilege of always moving yet never leaving anything behind. Whatever we have been, in some sort we are still.
- C. S. Lewis, The Allegory of Love, ch. 1
Fun fact: I'm reading a library copy of the book, and these lines are underlined and starred in this copy. Apparently someone else liked what Lewis had to say, too. (There's a parallel about the universality of human thought in that somewhere...)