Life is pleasant. Death is peaceful. It's the transition that's troublesome.
现在不是去想缺少什么的时候,该想一想凭现有的东西你能做什么。
在数学中,你不是理解事物,你只是习惯了它们。
记着时间就是金钱。
Mathematics teaches us to think logically and to approach problems systematically.