Once More Lewis Carroll

The Warden's description of the Professor from the first chapter of Sylvie and Bruno seems appropriate:

He's a wonderfully clever man, you know. Sometimes he says things that only the Other Professor can understand. Sometimes he says things that nobody can understand!

Of course, it should go without saying:  ὁ ἔχων ὦτα ἀκούειν ἀκουέτω (Matthew 11:15).