Success is no accident. It is hard work, perseverance, learning, studying, sacrifice and most of all, love of what you are doing.

I like to take things step by step, and I don’t like to look too far ahead.

The beauty of mathematics only shows itself to more patient followers.

The most dangerous phrase in the language is, 'We've always done it this way.'

I'm just a normal person who happens to have an extraordinary job.

用秤称一称，才能知道轻重；用尺量一量，才能知道长短。