唐代诗人孟郊诗云:“破竹见贞心,裂竹见直文。残月色不改,高贤德常新。”具有高洁品德的人才能专注于学习,不畏困难,独立思考,勇于创新。心胸狭窄,修养较差的人,思维品质也往往较差。犹太物理学家埃伦菲斯特思维敏捷,具有相当好的批判能力,但他过分的苛求自己,心胸狭窄,常常把自己刚刚萌生出来的发明思想又自我否定,到后来发展到厌世恶生,用自杀结束了自己的生命。英国生物学家达尔文自小就立志弄清大自然的秘密,他22岁时以一个博物学家的身份参加科学考察, The poet of the Tang Dynasty poet Meng Jiao said: “Breaking down to see graciousness, cracking bamboo to see the literary text. The moonlight does not change, and Gao Xiande is often new.” Those with high moral character can concentrate on learning, fearing difficulties, thinking independently and being brave in innovation. People with poor minds and poor cultivation often have poor thinking quality. The Jewish physicist Elen Fest was quick-thinking and had a very good ability to criticize. However, he was excessively demanding and narrow-minded. He often denounced his newly-invented invention ideas and later denied it to the world. Suicide ended his own life. Darwin, a British biologist, determined to find out the secrets of nature since he was a child. At the age of 22, he participated in a scientific investigation as a naturalist.