The city's poor are like the roots of a tree: unseen, but essential to its survival.

我现在确信理论物理学实际上是哲学。

成功不是终点，失败也并非致命，重要的是继续前进的勇气。

永远不要停止学习，世界总是在变化。

The stock market is a voting machine in the short term and a weighing machine in the long term.

在数学中，旅程往往比目的地更重要。