"Henceforward quenched in darkness shall I see those I should never have seen; now blind to those whom, when I saw, I vainly yearned to know."
"Thrust me forth from your borders with all speed; set me within some vast dessert where no mortal voice shall greet me any more."
"And what is the favor that you beg of me?"
Blindness vs. Vison
Oedipus Rex is a classic example on portraying why not all those with eyes can see. Although Oedipus and the other characters have eyes and vision, they are blind to the truth and continue to act blindly.