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.

意识不是一种事物，而是一个过程。

Leadership is not about giving orders, but about inspiring others to achieve greatness.

还有什么地牢比自己的心更黑暗！还有什么狱卒比自己更无情！

数学不仅仅是抽象理论的集合，而是描述宇宙的语言。