幸福的家庭都是相似的，不幸的家庭各有各的不幸。

我们必须平衡短期需求和长期可持续性。

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.

The death of a beautiful woman is, unquestionably, the most poetical topic in the world.

生活是世界上最罕见的事情。大多数人只是存在，仅此而已。

领导力在于激励他人看到愿景并共同努力实现它。

数学的力量在于它的抽象性，使我们能够看到不立即显现的模式和联系。