里氏替换原则是面向对象编程中的一个基本概念，确保派生类可以替代其基类使用，而不会改变程序的正确性。

"The best way to innovate is to start with the customer."

在土地的沉默中，有等待被讲述的故事。

"The power of a film is in its silence, not just its dialogue."

对音乐家真正的考验不在于他们在音乐会上的表现，而在于他们在排练中的行为。

We innovate by starting with the customer and working backwards. That becomes the touchstone for how we invent.

The first lesson reading teaches is how to be alone.