Thanks @malay11 for this comment contest.
MORAL : you can't gain victory unless you gained over ignorance.
Explanation of the moral learned :
The father suffered for not really knowing the content of that page 182.
So as a consequence he let the girl go, the girl is talking in proverb but he didn't understand.
That's why people use to say "stay ignorance and die for it" and according to Dalai Lama who says
"where ignorance is our master, there is no possibility of real peace "
One should acquired more knowledge and understanding both in your field and other profession.
Googluck to everyone!