里氏替换原则是面向对象编程中的一个基本概念，它指出子类的对象应该能够替换超类的对象而不影响程序的正确性。

Challenges are opportunities in disguise—if you're willing to look closely.

The world is a place of the living, and the dead have no place in it. The dead are nothing. They are not even a memory. They are forgotten.

在科学中，重要的不是获得新的事实，而是发现思考它们的新方法。

心有其理，理性不解。

Art is a wound turned into light.

心理事件确实只有通过内省才能被我们知晓，但内省并非其唯一特征。