我已经履行了我的职责。我证明了庞加莱猜想，我在数学上没有什么可做的了。

一家公司真正的价值在于它的员工，而不仅仅是资产负债表。

The only way to change behavior is through manipulation of reinforcement contingencies.

The greatest happiness which can happen to any country is the taking of the supreme power out of the hands of the governing few and putting it into the hands of the governed many.

作家必须是历史的见证者，即使历史忽视他。

Never underestimate the power of small, consistent improvements.

世界上有很多好人。如果你找不到一个，那就成为一个。