The teacher's task is not to implant facts but to place the subject to be learned in front of the learner and, through sympathy, emotion, imagination, and patience, to awaken in the learner the restless drive for answers and insights which enlarge the personal life.

近似算法证明了在实现实际解决方案中妥协的力量。

The road of excess leads to the palace of wisdom.

When I see someone wasting a glass of water, I think of those who don't have water on Earth.

To do mathematics is to engage in an act of discovery and conjecture, intuition and inspiration.

如果你不知道，意见有什么用？

边界？我从未见过。但我听说它们存在于某些人的脑海中。