οὐ γὰρ εὐπορῶν αὐτὸς τοὺς ἄλλους ποιῶ ἀπορεῖν, ἀλλὰ παντὸς μᾶλλον αὐτὸς ἀπορῶν οὕτως καὶ τοὺς ἄλλους ποιῶ ἀπορεῖν.
For I perplex others, not because I am clear, but because I am utterly perplexed myself.
Socrates, 5th century B.C.
from the Meno by Plato (section 80c-d)