Interpretation: Proverbs. Metaphor as long as you make up your mind and work hard, you can succeed no matter how difficult it is.

Source:

Song Shengzhen: It is said that Li Bai studied like an ear in the mountains, but he gave up his studies before he finished it. "When I crossed the stream, I sharpened my iron pestle at the age of 18 and asked him," I want to be a needle. "Taibai felt this and left school.

Li Bai, a great poet in the Tang Dynasty, didn't like reading when he was a child. One day, while the teacher was not at home, he sneaked out to play.

He came to the river at the foot of the mountain and saw an old woman grinding an iron pestle on a stone. Li Bai was puzzled and asked, "Old woman, what are you doing grinding the iron pestle?"

The old woman said, "I am grinding the needle." Li Bai asked in surprise, "Oh dear! As thick as a pestle, how can it be ground into a needle? " The old woman walked over and said, "As long as the pestle is always ground more and more finely every day, are you still afraid that it is not a needle?"

The clever Li Bai thought of himself and ran back to the library. From then on, he kept in mind the truth that "as long as kung fu is deep, the iron pestle is ground into a needle" and studied hard.