I have not told the half of what I saw.
我还没有把我所见所闻的一半告诉你们。
The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
The most dangerous phrase in the language is, 'We've always done it this way.'
"To be hopeful in bad times is not just foolishly romantic. It is based on the fact that human history is a history not only of cruelty, but also of compassion, sacrifice, courage, kindness."
相信生命是值得的，你的信仰将有助于创造这个事实。
成为你希望在世界上看到的变化。
The four most dangerous words in investing are: 'this time it's different.'