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有时最重要的实验是那些失败的实验,因为它们教会我们什么是行不通的。
The heart is an organ of fire.
It's not always necessary to be better than everyone else, but to be better than you used to be.
"The only way to make sense out of change is to plunge into it, move with it, and join the dance."
Optimists tend to interpret their troubles as transient, controllable, and specific to one situation. Pessimists, on the other hand, believe that their troubles last forever, undermine everything they do, and are uncontrollable.
The world is full of obvious things which nobody by any chance ever observes.