如果你没有偶尔失败,说明你还没有足够努力地突破界限。
逆向思考往往能带来意想不到的好处。
A mind needs books as a sword needs a whetstone if it is to keep its edge.
重要的不是拥有,而是得到。
The most important skill in mathematics is the ability to ask the right questions.