Is there any example of a famous person who was lazy as a child but later screwed up in an exam or something else and changed his ways? urgent

1. Iron pillars ground into needles

Song Dynasty Zhu Mu's "Fangyu Shenglan Meizhou Mozhen River": "At the foot of Elephant Er Mountain, it is said that Li Taibai studied in the mountain , before abandoning it, I crossed the stream and met an old woman grinding an iron pillar. When I asked her, she said, "I want to make a needle." Taibai realized what he meant and returned to work."

Translation: The needle-grinding stream is in Meizhou. At the foot of Elephant Ear Mountain. According to legend, Li Taibai was studying in the mountains, but gave up and left before he finished reading. After crossing the stream, he saw an old woman grinding an iron pestle. Li Bai felt strange and asked her. The old woman replied, "I want to make a needle." Li Bai asked, "Can I grind an iron pestle into a needle?" The old woman replied. Said: "All it takes is deep work!" Li Bai was moved by her perseverance (will) and returned to the mountain to complete his studies. The old woman herself said that her surname was Wu, and now there is Wu's Rock next to Mozhen Creek.

2. Choosing Neighbors

Han Dynasty Liu Xiang's "Biography of Women and Mother Yi Biography": "Mencius was a young man who returned after learning, and Meng's mother made great achievements. Mencius asked, "Where is the learning?" Mencius said, "Ziruoye." Mencius was afraid and asked why, "Ziruoye".

Translation: In order to educate Mencius not to abandon his studies midway, Meng’s mother used the metaphor of a cut yarn that cannot become cloth; Meng’s mother moved to different places and chose a good environment to influence Mencius’ growth.