The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.
The best is yet to be, the last of life, for which the first was made.
The low price-earnings strategy has worked for me for 30 years.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。