What are you reading?" Polonius asked.
"Words, words, words," said Hamlet.
"And what's the subject?"
"Lesser than the king, but still not nothing."
It took Polonius a moment to realize he had answered another meaning of 'subject.' "I mean what do you read about?"
"All in a line, back and forth." said Hamlet. "I go from left to right with my mind full, and then must drop it there and head back empty-headed to the left side again, and take up another load to carry forward. It's a most tedious job, and when I'm done, there are all the letters where I found them, unchanged despite my having carried them all into my head.

Autor: Orson Scott Card