The only way to save a rhinoceros is to save the environment in which it lives, because there's a mutual dependency between it and millions of other species of both animals and plants.

在数学中，真理总是相对于你所在的系统而言的。

The best stories don’t talk down to children—they invite them in.

心理活动总是朝向某个目的。

自信来自于准备充分并精通自己的领域。