Why did the ancients write books?

1. Reading in the middle of the month: Nanqi Jiangbi's family was poor. He makes shoes for a living during the day and finds time to study at night. When he can't light the lamp, he takes the book to the roof and reads by moonlight. Bai Juyi said in a poem: "There is no cloud in the sky, and there is a moon in the mountain pavilion. Read the bright moon and sing in the wind." Meng Jiao once wrote a poem, "When the night is poor, the bright moon shines on my book", which shows that many people in ancient times had the experience of borrowing the moon to study.

2. Blister fireflies reflecting snow: Blister fireflies reflecting snow means that Che Yin and Sun Kang in the Jin Dynasty could not light up at night in order to study. Che Yin catches fireflies in summer and puts them in silk bags for lighting, while Sun Kang studies them under the snow in winter. Later, this allusion was quoted in Saint Amethyst: "Like a firefly, like a snow, although my family was poor, I never stopped studying."

3. Digging the Corner to Steal Light: Kuang Heng, a scholar in the Western Han Dynasty, came from a poor family and was eager to learn. There was no light at night, so he dug a hole in the wall to read by his neighbor's candlelight. There are many books in a large local family, so Kuang Heng went to his house to work, but he didn't want to be paid. The master was surprised and asked him why. He said, "I want to get the master's books and read them all." The host was very moved and gave him books as a reward. Later, Kuang Heng became a learned scholar.