让人受用终生的英语句子

 
      "When one door of happiness closes, another opens but often we look so long at the closed door that we don't see the one which has been opened for us."
       当一道快乐之门关上了，另一道门会随之打开。但是，我们常常眷恋着那道关上了的门，而看不见另一道门已经打开了。