成本不是为了计算而存在的，而是为了被降低而存在的。

The future of life on Earth depends on our ability to take action. Many individuals are doing what they can, but real success can only come if there is a change in our societies and our economics and in our politics.

True progress comes when industry and environmentalists work together, not against each other.

Robots are the future, but the future is not robots.

编程语言中最重要的东西是名字。没有好名字的语言不会成功。我最近发明了一个非常好的名字，现在我正在寻找一种合适的语言。