"The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter."

The real opposition is that between the ego-bound man, whose existence is structured by the principle of having, and the free man, whose existence is structured by the principle of being.

Continuous improvement is not just a process; it’s a mindset that should be ingrained in every employee.

追求数学真理就是追求美、优雅和简洁。

集合论的悖论不应被视为理论本身的不一致，而应被视为表明某些被认为有效的推理方法实际上并非如此。

"You never really understand a person until you consider things from his point of view."