A happy person is not a person in a certain set of circumstances, but rather a person with a certain set of attitudes.
解析：禪定正義。
He who fights with monsters should be careful lest he thereby become a monster.
我看到了，我忘記了；我聽到了，我記住了；我做過了，我理解了。
人民是根，人民是基礎(chǔ)，人民是力量的源泉。