数学是将复杂转化为清晰的艺术。

The first fruit of this imagination - and the first lesson of the social science that embodies it - is the idea that the individual can understand his own experience and gauge his own fate only by locating himself within his period, that he can know his own chances in life only by becoming aware of those of all individuals in his circumstances.

世界是一本书，不旅行的人只读了一页。

大自然为所有活动都观察了合适的时间。

我们必须倾听土著知识——几个世纪以来，他们一直是森林的守护者。