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The deepest problems in mathematics often arise from the simplest questions.
做义事也是这样,能演说的就演说,能讲书的就讲书,能做事的就做事,这样义事才可以成功。 
What's terrible is to pretend that second-rate is first-rate. To pretend that you don't need love when you do; or you like your work when you know quite well you're capable of better.
我对自己是谁、做什么非常有信心。