解释：看到兔子再回头唤猎狗，还不算太晚；跑掉了羊再去修补羊圈，也不算太迟。

The causal perspective is the key to unlocking the mysteries of the universe.

Success? I don't know what that word means. I'm happy. But success, that goes back to what in somebody's eyes success means. For me, success is inner peace. That's a good day for me.

It is silly not to hope, he thought.

我们生产的每一桶石油都应着眼于最小化我们的足迹。

Reason obeys itself; and ignorance submits to whatever is dictated to it.