The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
一个好的数学问题的定义是它产生的数学,而不是问题本身。
表达对命运和机缘的豁达态度,常见于角色面对困境时的自我宽慰。
The only person you should try to be better than is the person you were yesterday.