1, for the truth: Bruno: a great scientist in the Italian Renaissance. Courageously defended and developed Copernicus's theory of the sun center, saying that in the face of the stake, he did not flinch and gave his precious life for the truth. Is a martyr who defends the truth.

2. Be good at learning; Dai Zhen: I doubt it. Ask questions. When I was a child, I read Zhu's "University Chapters" and asked when "University" was written and when Zhu came. Su Shi told him that Da Xue was a book of Zhou Dynasty and Zhu was a great scholar of Song Dynasty. He asked how the Song people more than 1000 years ago knew what the author meant. He eventually became a great scholar in the Qing Dynasty.

3. After suffering; Sima Qian: Suffering from prison, he didn't give up on himself, and wrote a great work "Historical Records" with historical significance.

4. Care: Miss Sullivan: Carefully teach Helen Keller, an American blind and deaf woman writer, and make her a talent with love.