The Weight of Glory

by C.S. Lewis

It is clear that in each case what is happening in the lower medium can be understood only if we know the higher medium. The instance where this knowledge is most commonly lacking is the musical one. The piano version means one thing to the musician who knows the original orchestral score and another thing to the man who hears it simply as a piano piece. But the second man would be at an even greater disadvantage if he had never heard any instrument but a piano and even doubted the existence of other instruments. Even more, we understand pictures only because we know and inhabit the three-dimensional world. If we can imagine a creature who perceived only two dimensions and yet could somehow be aware of the lines as he crawled over them on the paper, we shall easily see how impossible it would be for him to understand. At first he might be prepared to accept on authority our assurance that there was a world in three dimensions. But when we pointed to the lines on the paper and tried to explain, say, that “this is a road,” would he not reply that the shape which we were asking him to accept as a revelation of our mysterious other world was the very same shape which, on our own showing, elsewhere meant nothing but a triangle. And soon, I think, he would say, “You keep on telling me of this other world and its unimaginable shapes which you call solid. But isn’t it very suspicious that all the shapes which you offer me as images or reflections of the solid ones turn out on insp...