The Liskov Substitution Principle is a fundamental concept in object-oriented programming, stating that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.

形式化方法的美在于它们能够提供关于系统正确性的绝对确定性。

建筑关乎无形之物，如同有形之物。

天赋是你投入努力时技能提升的速度。努力是让技能产生成果的关键。

Technology should empower farmers, not replace their expertise.

做数学就是探索一个思想的宇宙，唯一的限制是你的想象力。

处理一个不自由的世界唯一的方法就是变得如此绝对自由，以至于你的存在本身就是一种反叛。

"The power of words is immense; they can heal, they can destroy, and most importantly, they can transform."