The periodic table hasn't changed, but how we use its elements must.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

The beauty of instrumental variables is that they allow us to see the world in a new light.

I have held many things in my hands, and I have lost them all; but whatever I have placed in God's hands, that I still possess.

你的努力（锻炼、陪伴、工作）的一致性远比数量重要。没有什么可以击败每天坚持做的小事，这比偶然做的事情重要得多。

Technology is nothing. What's important is that you have a faith in people, that they're basically good and smart, and if you give them tools, they'll do wonderful things with them.