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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.
当没有人相信你时,你必须相信自己。
The next green revolution won't come from a lab alone—it will come from farmers' fields around the world.