Who knows which poem "Learn something" and "Silkworms should be cocoons after sleeping" come from?

Zuo Tang Zong, born on the seventh day of October in the seventeenth year of Jiaqing (A.D. 18 12), was a Zuojiaren in Xiangyang, Hunan Province, and came from a family of lower-class landlords and intellectuals. He has been studying at home since he was four years old. In the 12th year of Daoguang (AD 1832), he participated in the provincial and township examinations and won the list with his brother. Shortly after winning the list, he married a rich woman named Zhou Zhiduan in Xiangtan. At this time, Zuo was young and Shi Ma was ambitious, thinking that the door to official career had been opened. In the 13th year of Daoguang (A.D. 1833), Zuo Zongtang, who was determined to govern the country, left home to attend the national examination in Beijing. The examination will be held on March 9th,12nd and15th of that year. Because most of Zuo's study energy is spent on learning practical knowledge, it is difficult for him to show his talents in the rigid stereotyped writing examination. After three days of exams, Zuo unfortunately failed the list. After that, Zuo took the second exam, but he still failed in Sun Shan. Zuo, who suffered a series of blows, fell into depression. In order to express his depression, he wrote a series of poems, including "What can I do for study?"? "Silkworms should be cocoons after sleeping" fully shows his lonely and melancholy mood. Zuo, who failed the science exam, began to devote himself to studying knowledge. With the goal of "saving the world", he studied a large number of books on military and geography. In the 18th year of Daoguang (A.D. 1838), Zuo, who devoted himself to studying and serving the country, came to the home of Tao Shu, the governor of Anhua's filial piety. During this period, Zuo accumulated a lot of wisdom and knowledge until he came out of the mountain for more than ten years, and his research in geography, agronomy, economy, border defense and foreign relations gradually reached its peak. He perfected and redrawn the map of Qing Dynasty, copied Ji Fu Zhi, Xi Yu Zhi and other provinces Zhi, and wrote Wide Area Zhi and Tian Ye Zhi. These achievements laid a solid foundation for his later way of governing the army and the people. Hu Linyi, Tao Shu, Lin Zexu and other officials who appreciated Zuo Cai never stopped recommending and paying attention to him during his ten years of seclusion.