君子有三惜：此生不学，一可惜。此日闲过，二可惜。此身一败，三可惜。摘自
解释：君子有三件值得可惜的事：一辈子不学习，是第一件可惜的事；一天无所事事，是第二件可惜的事；一个人的名声败坏，是第三件可惜的事。
Government, even in its best state, is but a necessary evil; in its worst state, an intolerable one.
Rule of 7 in research. You can find out anything if you are willing to go seven levels. If the first source you ask doesn’t know， ask them who you should ask next， and so on down the line. If you are willing to go to the 7th source， you’ll almost always get your answer.
