十分的聪明只用七分就可以了，剩下三分留给子孙；如果要将十分聪明全都使出来，反而会适得其反，近的害了自己，远的害了儿孙。

The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

不存在能力、天赋、气质、心理素质和特征的遗传。

"The world is a book, and those who do not travel read only one page."

我预测美国人未来的幸福，如果他们能防止政府以照顾人民为借口浪费人民的劳动。

In the future, people will no longer be alienated by their labor, but by their leisure.