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：它是关于理解的。
世界上充满了显而易见的事情，却没有人注意到。
The world is full of stories, and from time to time they permit themselves to be told.
Every great novel is a journey into the unknown, both for the writer and the reader.
