正如几何学最自然的起点是数学点,在观察和自然历史中采用同样的方法也最真实、简单且富有教益。
One has to pay dearly for immortality;one has to die several times while still alive.
Nature is the greatest teacher.
The past is always changing, because we are always changing our relationship to it.
Sustainability is not a cost - it's the biggest innovation opportunity of our lifetime.