Ordinary language is all right.
One could divide humanity into two classes:
those who master a metaphor, and those who hold by a formula.
Those with a bent for both are too few, they do not comprise a class.
Glee, at discovering the roots of 'idiot' in idiōtēs, 'private person, layman, ignorant person', from idios 'own, private'.
It's a rainy day, sunshine girl.