It takes considerable knowledge just to realize the extent of your own ignorance.

解释：脚力不强劲，行程就不会远；刀刃不锋利，割东西就不会深。

知足是天然的财富，奢侈是人为的贫困。

Where I am, I don't know, I'll never know, in the silence you don't know, you must go on, I can't go on, I'll go on.

劳动可以使我们摆脱三大灾祸：寂寞恶习贫困。

质量从来不是偶然的，它始终是智慧努力的结果。

I want to create a world where everything is connected.

优秀的数学家应该既严谨又富有想象力。