"I know it's a ghost!" Matilda said. "I've heard it here before! This room is haunted! I thought you knew that." (4.56)
And now, quite slowly, there began to creep over Matilda a most extraordinary and peculiar feeling. The feeling was mostly in the eyes. A kind of electricity seemed to be gathering inside them. A sense of power was brewing in those eyes of hers, a feeling of great strength was settling itself deep inside her eyes. (14.26)
"Tip it!" Matilda whispered. "Tip it over!"
She saw the glass wobble. It actually tilted backwards a fraction of an inch, then righted itself again. She kept pushing at it with all those millions of invisible little arms and hands that were reaching out from her eyes, feeling the power that was flashing straight from the two little black dots in the very centres of her eyeballs. (14.28)