I am always glad to think that my education was, for the most part, informal, and had its roots in the soil.

数学教会我们逻辑思考并系统地处理问题。

It is not the benevolence of the employer that determines the wages of labor， but the competition among employers.

"When I approach a child, he inspires in me two sentiments; tenderness for what he is, and respect for what he may become."

Friendship is the most precious wealth of life.

内心平和，生活自然舒适。

译文：既然人知道羞耻和可恶，那么就会萌生善心。

如果预料中的快乐是无限大的，就请记住麻烦也可能是同样大。