“三人行,必有我师”出自《论语》,是古代大学者孔子说的一句自谦的话.孔子很有学问,但他很谦虚,自称与任意两人同行,他们中间一定有一个人可以做自己的老师.下面从数学的角度来分析这句话. “Three lines, there must be my teacher” comes from the “The Analects of Confucius”. It is a self-conceited phrase spoken by Confucius, an ancient university. Confucius is very knowledgeable, but he is very humble and claims to walk with any two people. There must be one of them. My own teacher. Let’s analyze this sentence from the perspective of mathematics.