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。
There are wounds that never heal, only scab over.
Quality is not an act, it is a habit.
Time is your friend; impulse is your enemy.
好弓难以拉开,然而可以射得高射得深;良马难以驾御,然而可以负重行远。