可持续发展不是一种选择，而是我们对后代的责任。
What ever you do, do it well. Do it so well that when people see you do it they will want to come back and see you do it again and they will want to bring others and show them how well you do what you do.
The present is the past rolled up for action, and the past is the present unrolled for understanding.
教育的艺术必须从教育的科学中汲取其法则。
Don’t fear failure—fear being in the same place next year as you are today.