We're also easily affected by our environment. Lots of people know that "if you do not forget the past, it can become your guide for the future." Immediately after something has happened people take it as a lesson for the future, but they soon forget and take the attitude that since everything is fine now, why worry?
人是健忘的，又容易受環境影響，很多人都知道「前事不忘、後事之師」的道理，但往往是事情發生後，「當下」覺得可以做為日後經驗，然而過一陣子又忘了，還是抱持著「現在樣樣都好，有什麼好小心？」