在数学中，解决问题的旅程与解决方案本身同样重要。

Psychology should focus on how the mind functions to solve practical problems, not just its abstract structure.

The tears of the world are a constant quantity. For each one who begins to weep, somewhere else another stops. The same is true of the laugh.

我们今天做出的每一个决定，都在塑造明天的森林。