你必须成为你希望在世界上看到的改变。
You must be the change you wish to see in the world.
Start where you are, with what you have. Make something of it and never be satisfied.
I've learned that you can't have everything and do everything at the same time.
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。
心理学家必须不带预设地研究心灵。
Even if we're apart, our hearts are always together.
关于幸福，你只有在失去它的时候才知道你曾经拥有过。
一部好小说告诉我们关于主角的真相；而一部坏小说告诉我们关于作者的真相。