A man takes a basketball and throws it as hard as he can. There is nothing in front, behind, or on either side of him, and yet, the ball comes back and hits him square in the face. How can this be?
He threw the ball straight up in the air.
Cái gì càng có thêm thì càng thiếu?
Nợ (càng thêm nợ thì càng thiếu tiền)