A failure is not always a mistake, it may simply be the best one can do under the circumstances. The real mistake is to stop trying.
从你所在的地方开始,用你所拥有的。做出一些成就。永远不要满足。
难以消化的美味,不要贪吃;难以获取的宝物,不要储藏;难以酬报的恩惠,不要接受;难以久处的朋友,不要交往;难以再现的光陰,不要失去;难以守护的资财,不要积贮;难以辩明的诽谤,不要辩白;难以解除的忿恨,不要计较。
When you solve a mathematical problem, you don't just get the answer - you understand why it's the answer.