戒酗酒，酗酒伤神；戒色欲，贪色灭精神；戒美味，美味使精神昏沉；戒过饱，过饱使精神郁闷；戒多动，多动使精神混乱；戒多话，多话损伤精神；戒多忧，多忧使精神郁结；戒多思，思虑多刺激精神；戒久睡，久睡使精神疲倦；戒久读，久读使精神苦劳。

知识只有在应用时才有用。

恐惧是自由的敌人。

The world is a tragedy to those who feel, but a comedy to those who think.

The past is never dead. It's not even past.

I'm not afraid of aging. I think it's a privilege to grow old.

一个好的抽象是捕捉概念的本质方面，同时忽略无关的细节。