OT: Didn't Socrates know anything? (was: Coming Down From The Pedestal)

[Aristotle]

FWIW, a better translation of that quotation might be:

The only true wisdom is in knowing that what you know is nothing.

The difference is less subtle in Greek, which has several different words that are canonically translated as “nothing,” but differ in connotations. (Its vocabulary is rife with such near-synonyms, whose precise associations are nigh impossible to preserve in translation to most languages.)