可持续发展不是选择，而是对后代的责任。

你不会忘记那个曾是你最后希望的人的面孔。

You have to believe in yourself when no one else does.

The biggest risk is not taking any risk. In a world that's changing quickly, the only strategy that is guaranteed to fail is not taking risks.

教育学不是关于训练，而是关于严格教育人们进行自我反思，能够批判性地处理他们与他人及更广阔世界的关系。