Davus sum, non Œdipus (I am a plain, simple fellow, and no solver of riddles, like Œdipus). The words are from Terence’s Anʹdria, i. 2, 23.
Non te credas Davum ludere. Donʹt imagine you are deluding Davus. “Do you see any white in my eye?” I am not such a fool as you think me to be.