大脑就像肌肉一样，当我们使用时会感到愉悦。理解是充满欢乐的。

The most important thing for any leader is to bring clarity to where the world is going.

The conversation about coal must move beyond 'pro' or 'anti'—we need solutions, not slogans.

I don’t need a reason to be great.

But I miss you, Jenny. If there's anything you need... I won't be far away.