The more you know, the more you realize you don't know.

The less secure a man is, the more likely he is to have extreme prejudice.

"We are all our own graveyards I believe; we squat amongst the tombs of the people we were."

Sustainability is not a choice; it's our responsibility to future generations.

"A wordless book speaks in a universal language."

科学中最重要的不是获得新的事实，而是发现思考它们的新方法。

如何道歉：快速、具体、真诚。

I'm not perfect, and I don't pretend to be.