I am not young enough to know everything.
我已经不再年轻,不再无所不知。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors."
译文:贫穷的人不用学俭朴,自会俭朴,卑贱的人不用学谦恭,自会谦恭。