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The trust of the innocent is the liar's most useful tool.
In mathematics, the art of proposing a question must be held of higher value than solving it.
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'
种树的最佳时间是20年前,第二好的时间是现在。
The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.