The only limit to our realization of tomorrow will be our doubts of today.

When you work on hard problems long enough, you start to see connections where others see only confusion.

文字的力量在于它们能够在世界中创造世界。

There's a tendency to think that our present politicians are much worse than we had in the past.But we tend to forget how awful our politicians were in the past.

我喜欢夜晚。没有黑暗，我们永远看不到星星。