质量不是标签；它是一种标准。

There are other reasons --There are other reasons why it's perhaps harder now to feel calm than ever before. One of these, and it's paradoxical, because it's linked to something that's rather nice, is the hope we all have for our careers. Never before have expectations been so high about what human beings can achieve with their life span.

我不考虑过去。我不考虑未来。我只考虑现在。

我不是为了快乐而写作，我是为了自由而写作。

概率论是我们处理不确定性的唯一工具。

发明家的职责是使他的工作尽可能对公众有用和可及。

光是建筑中最重要的材料。