Gregory the Dialogist

Hear my speech, and take in my riddles with your ears. Herein, that he names 'riddles,' he shews that he has parts of his speech framed in figures. Whence too it is fitly added by the voice of the faithful People.

Morals on the Book of Job, Book XI ↗

Thomas Aquinas

Then as he is about to enter into a debate, he first renders his listeners attentive in two ways: in one way by couching what he will say with a certain mystery, since if we declare what must be said to be difficult, our listeners would be more attentive. So he says, "Hear my discourse and understand my riddle with your ears." A riddle is an obscure discourse, which presents one thing on the surface and means something else internally.

Commentary on Job ↗