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。
If you get up in the morning and think the future is going to be better, it is a bright day. Otherwise, it's not.
时间是最民主的东西;它平等地给予每个人,但每个人使用它的方式不同。