数学之美不仅在于它描述世界的能力，还在于它揭示支配世界的隐藏结构的力量。

The past is a shadow, always following, but never catching up.

The problem of quality management is not what people don't know about it. The problem is what they think they do know.

种荆棘会得到刺，种桃李会得到树荫。比喻善恶有报

建筑不是解决问题，而是创造氛围。