生活的目的不是快乐。它是有用的，是光荣的，是富有同情心的，是让你活得有意义并且活得好。
The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.
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.
艺术是我对抗疯狂的武器。
