... when wondering through her memories felt like walking into a pitch black room, full of sharp corners. "... You were right Selma, listen to your Heart"
Blindness is a condition of the eyes because science it's not interested in studying non-physical existences, but there's blindness in thinking too.
Listen to your heart, when your mind is seeing something else. The Heart will never be blind for it never has had eyes, so it doesn't need them. It can see far more than we imagine because it feels.
I feel, you feel, he and she feels, we feel and they feel.