The whole problem with the world is that fools and fanatics are always so certain of themselves， and wiser people so full of doubts.

Quality is not a destination, it is a journey.

有时帮助穷人的最好方式是给他们现金，让他们自己决定如何使用它。

当我们保护生物多样性时，我们保护的是自然恢复力的蓝图。