技术的边界在于人类的想象力。

教师必须相信学生的潜力。

Failure is just a stepping stone to success. It's not the end, it's just part of the journey.

Marxian Socialism must always remain a portent to the historians of Opinion — how a doctrine so illogical and so dull can have exercised so powerful and enduring an influence over the minds of men， and， through them， the events of history.

每个采石场都有两个故事：地下的岩层和周围的社区。明智的领导者会倾听两者。