心理学是科学，教学是艺术；科学永远不会直接从自身产生艺术。

The essence of mathematics lies in its freedom.

不要一直重复犯错；试着去犯新的错。

"We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct."

对我来说，未说出口的东西具有巨大的力量。

The greatest theorems often start as simple conjectures, born out of intuition.

气候变化是本世纪的战斗，我们必须赢得胜利。

Knowledge is of no value unless you put it into practice.