In speaking of this desire for our own far-off country, . . . I feel a certain shyness. I am almost committing an indecency. I am trying to rip open the inconsolable secret in each one of you - the secret which hurts so much that you take your revenge on it by calling it names like Nostalgia and Romanticism and Adolescence; the secret also which pierces with such sweetness that when, in very intimate conversation, the mention of it becomes imminent, we grow awkward and affect to laugh at ourselves; the secret we cannot hide and cannot tell, though we desire to do both . . .
These things - the beauty, the memory of our own past - are good images of what we really desire; but if they are mistaken for the thing itself they turn into dumb idols, breaking the hearts of their worshippers. For they are not the thing itself; they are only the scent of a flower we have not found, the echo of a tune we have not heard, news from a country we have never yet visited . . .
C.S. Lewis, The Weight of Glory, a sermon preached at Oxford, June 8, 1941