The meaning of this sentence was," If you want something from others, you have to pay the corresponding price." In novels, this phrase was often used to describe the protagonist's spirit of constant struggle and hard work in order to achieve a certain goal. The protagonist's mother had told him since he was young that if he wanted to get something from others, he had to pay a corresponding price. This made the protagonist understand that only through hard work and endurance could he get what he wanted. Therefore, the protagonist was very serious about his work. He knew that if he didn't work hard, he wouldn't get anything. Therefore, he would work hard and exchange sweat and hard work for rewards. This kind of spirit also infected the people around them. Everyone began to work hard for the same goal.