– Alan Holden and Phylis Singer, Crystals and Crystal Growing (1960)
This passage asks you to visualize something no human has ever seen – the atomic structure of a molecule – in terms of something invented by humans: a skyscraper. As a description, it would be wholly self-referential, and useless as a unicorn, if the imagined hotel did not connect in some way with real solids in the observable world.
Happily, the image agrees with results from scientific experiments. Materials that physicists classify as solids test positive for hotel-ish qualities: uniformity of material, repetitious structure, and interlocking connections. Experiments would yield very different results if it turned out solids were really more like a loose pile of clothes in a hamper than like the Waldorf-Astoria.
In most ways, admittedly, the hotel comparison is bogus. Atoms are subject to vibrations and attracting forces that would make a hotel uninhabitable. But this is how metaphor works: by describing a thing as if it were something else, which it is not. This is what poets mean when they say they tell “lies” to reveal a truth. This is what fiction is. We imagine what the eye literally cannot see, and sometimes there is truth in it.