我国战国时期的亚圣孟子说过:“困于心,衡于虑,而后作;生于忧患,而死于安乐也.”这意思是说,一个人如果生活中经常遇到一些困难曲折,敢于拼搏斗争,奋发向上,就能够取得作为;反之,如果生活过于优裕平顺,人的精神、意志反而容易萎靡不振,消极颓废.古今中外许多数学家的经历以及现实生活中的一 In the Warring States period, the sub-Sanctuary Mencius said: “Embeded in the heart, weighed in, and then made; born in worries and died in peace.” This means that if a person encounters some difficulties and twists in his life, If you dare to fight hard and strive to make progress, you will be able to achieve; on the contrary, if life is too smooth, the spirit and will of the people will easily become sluggish and negative. The experience of many mathematicians in ancient and modern times, both at home and abroad, and in real life