Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.

Sun don't shine forever, but as long as it's here then we might as well shine together.

在5年的时间里，我们获得了一种精湛的编程语言。只有我们无法控制5年期限。

Ninety-nine percent of the troubles that threaten our civilization come from too optimistic, therefore we should have a system where the accounting is a way more conservative.