The world is a place of the living, and the dead have no place in it. The dead are nothing. They are not even a memory. They are forgotten.

唯一真正的发现之旅不在于寻找新的风景，而在于拥有新的眼光。

教授数学是为了激励下一代的思考者和问题解决者。

我相信讲故事有改变世界的力量。