解釋：明智的人不違背時機而放棄有利的行動，勇士不回避死亡而埋沒名聲，忠臣不先顧及自己后顧及國君。
Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.
The best way to escape from a problem is to solve it.
A book is a mirror: if an ape looks into it, an apostle is unlikely to look out.
Every discovery in science is built upon the work of countless others before us.
You may not control all the events that happen to you, but you can decide not to be reduced by them.
Remember, if you ever need a helping hand, it's at the end of your arm, as you get older, remember you have another hand: The first is to help yourself, the second is to help others.