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Fear not for the future, weep not for the past.
Every mathematical problem has a solution; it's just a matter of finding the right perspective.
The solution of a problem appears suddenly and is not approached by a gradual, step-by-step procedure.
历史中的优点似乎有三种,一种是来自气候和国家的纯粹地理位置,一种是来自政府形式和人民性格,一种是来自那些更细致的哲学原则和道德,可以称为哲学的推荐。
A 1% improvement in efficiency could mean the difference between life and death.