What then is truth? A mobile army of metaphors, metonyms, and
anthropomorphisms: in short, a sum of human relations which have been
poetically and rhetorically intensified, transferred, and embellished, and
which, after long usage, seem to a people to be fixed, canonical, and binding.
Truths are illusions which we have forgotten are illusionsthey are metaphors
that have become worn out and have been drained of sensuous force, coins which
have lost their embossing and are now considered as metal and no longer as
coins.
-Nietzche