那些被看到跳舞的人被那些听不到音乐的人认为是疯了。
If you fulfill your obligations everyday you don't need to worry about the future.
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.
