在数学中，提出问题的艺术必须比解决问题更有价值。
In mathematics, the art of proposing a question must be held of higher value than solving it.
"The world is full of obvious things which nobody by any chance ever observes."
我是那种精神不正常的人。
A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.
Never underestimate the power of small steps—they lead to big transformations.
"Books can be mirrors, windows, and sliding glass doors."
The brain is a naturally selected information processor.
知识的增长是解决问题的关键。