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.

Space is the protagonist of architecture.

"The truth is rarely pure and never simple."

失败使我的内心产生一种安全感，这是我从考试中没有得到过的。失败让我看清自己，这也是我通过其他方式无法体会的。我发现，我比自己认为的，要有更强的意志和决心。我还发现，我拥有比宝石更加珍贵的朋友。

The elegance of a proof is as important as its correctness.

知识只有在它有助于人类解放时才有价值。