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 to be obeyed.

一幅画永远不会完成，只会被放弃。

今天在可持续性方面的小步骤可能带来明天的巨大变化。