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。
我们以为我们有这么多问题。我们怎么知道我们是幸福的?
I create not for beauty, but for truth.
The most dangerous stories are the ones we believe without question.