I don’t sleep, I rest my eyes.

If you ask an economist what’s driven economic growth, it’s been major advances in things that mattered – the mechanization of farming, mass manufacturing, things like that. The problem is, our society is not organized around doing that.

解释：对别人没有恩德，却想有求于人，这是罪过。

《与邵元冲的谈话》（1919年5月20日）