Human freedom is bounded by its choices.
能源的未来在于多样化和适应性。
数学的快乐来自于复杂事物变得简单的清晰时刻。
The only way to do great work is to love what you do.
"If liberty means anything at all, it means the right to tell people what they do not want to hear."
如果自由有任何意义的话，那就是告诉人们他们不想听的事情的权利。