"Famous people, famous words" is an educational series from 1996, presenting a number of famous persons, both Chinese and foreign, and their famous utterances. Li Siguang (李四光, 1889-1971), also known as J. S. Lee, was a geologist and politician. He was the founder of China's geomechanics. He was an ethnic Mongol.
This quote from Li reads: "Truth, even if we only see a thread, we can’t let its brilliance dim" (真理，哪怕只见到一线，我们也不能让它的光辉变得暗淡).