在暴君有权杀死一个国家的权利被证明之前，一个国家在必要时杀死暴君的权利永远不会被怀疑。
The right of a nation to kill a tyrant in case of necessity can never be doubted until the right of a tyrant to kill a nation has been proved.
I’m positive that in 100 years much of what I take to be true today will be proved to be wrong， maybe even embarrassingly wrong， and I try really hard to identify what it is that I am wrong about today.
Stay true to yourself and never sacrifice who you are for anyone.
一个人只要愿意，就是自由的。
"You can't knock on opportunity's door and not be ready."
"Science is the art of understanding the universe's language."
成功的最好方法是坚持不懈。