Sustainability is not a cost - it's the biggest innovation opportunity of our lifetime.

The less virtue， the more wealth there is； the less wealth， the more virtue.

我们的教学方法只有一个，就是必须维持孩子们的高度兴趣和强烈持续的注意力。

"We are all in the gutter, but some of us are looking at the stars."

要知道，终有一天，我们会是自由的。