Here are people who know that there is no steel, only the idea of steel. [*] They give names to new things, and to things that don’t exist. They seek the essence of being and the nature of the soul. They make wisdom.
[* But they still use forks, or, at least, the idea of forks. There may, as the philosopher says, be no spoon, although this begs the question of why there is the idea of soup.]
(Terry Pratchett. Thief of Time)