"The only true wisdom is in knowing you know nothing."

The most valuable thing you can make is a mistake—you can't learn anything from being perfect.

The truth is, the science of Nature has been already too long made only a work of the brain and the fancy: It is now high time that it should return to the plainness and soundness of observations on material and obvious things.

小农场不是遗迹，而是创新的实验室。

距离不仅仅是一个物理概念，还是一个社会和经济概念。

没有艺术；没有文学；没有社会；最糟糕的是，持续不断的恐惧和暴力死亡的威胁；人的生活孤独、贫困、肮脏、野蛮而短暂。