Jojen: Open your eye.
Bran: They are open. Can’t you see?
Jojen: Two are open. One, two.
Bran: I only have two.
Jojen: You have three. The crow gave you the third, but you will not open it. With two eyes you see my face. With three, you could see my heart.
– George R. R. Martin, A Clash of Kings