Every mathematical problem is a puzzle waiting to be solved, and every solution is a step towards greater understanding.

If you are looking for something in your house， and you finally find it， when you’re done with it， don’t put it back where you found it. Put it back where you first looked for it.

你围绕真相建立生活，然后真相改变了。

心灵的主要任务是为行动组织经验。

我喜欢旅行，但不喜欢到达目的地。