盖亚假说是一种将地球视为有生命的系统的方式,不是情感上的,而是作为一个系统。
The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.