The most expensive thing in the world is trust. It can take years to earn and just a matter of seconds to lose.
艺术是让我们认识真相的谎言。
The complexity of a learning problem is often determined by the size and structure of the hypothesis space.
——《在广州岭南学生欢迎会的演说》（1923年12月21日）
The soil remembers what we forget: respect it, and it will repay generations.
We've learned that change is necessary for growth.
