Which of the following lines contains a metaphor for learning:
"I always took my book with me, and by going one part of my errand quickly, I found time to get a lesson before my return."
"As many of these as I could, I converted into teachers."
"You will be free as soon as you are twenty-one, but I am a slave for life!
"This bread I used to bestow upon the hungry little urchins, who, in return, would give me that more valuable bread of knowledge."
