The truth is: the natural world is changing. And we are totally dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.
世界上最好和最美丽的东西是看不见甚至摸不到的——它们必须用心去感受。
The most difficult thing in life is to know yourself.
It is silly not to hope, he thought.