朗兰兹纲领的猜想不仅仅是待解决的问题，而是关于数学应该如何的愿景。

过去不等于未来。

The writer must believe that what he is doing is the most important thing in the world. And he must hold to this illusion even when he knows it is not true.

循环经济是一个创造价值的机会，而不仅仅是减少浪费。