以往花费许多力量也不能推动它,今天在水中间却能自在地移动。
Our frustration is greater when we have much and want more than when we have nothing and want some. We are less dissatisfied when we lack many things than when we seem to lack but one thing.
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。
The greatest problem for mathematicians now is probably the Riemann Hypothesis.