用户界面中最重要的东西是反馈。
在科学中最令人兴奋的短语，预示着新发现的，不是“我找到了！”而是“这有点奇怪……”
The reason why men enter into society is the preservation of their property.
Land is a peculiar commodity, which is different from all others, and the quantity of it is always fixed and limited.
The purpose of education is to make up for the shortcomings in our instinctive ways of thinking.
