A precious glass of milk saves two life

A glass of milk: Once upon a time there was a poor boy who made a living by selling various things from door to door. This is how he earned money to pay for school. One day, while going from house to house as usual, he felt very hungry and weak. He felt he couldn't even walk a few steps. He decided to ask for food at the house. He knocked on the door and was stunned to see a beautiful young girl answer the door. With great hesitation, he asked the girl for a glass of water. The young girl understood his condition and offered him a huge glass of milk. With a surprised look, the boy drank milk very slowly. How much do I owe you for this milk? he asked her. The girl replied: "I don't want money for it." The boy thanked the girl from the bottom of his heart and left. Years have passed. The young girl grew up. Unfortunately, when she was young, she fell ill and was diagnosed with a rare nervous disease. Many experienced doctors were puzzled by her condition, and she was admitted to the city hospital with state-of-the-art equipment. Doctor Kevin, a renowned neurologist, was called to the hospital to examine her. Despite his extraordinary experience, Dr. Kevin found that the girl's illness was very difficult to cure. However, through perseverance and hard work over several months, he finally managed to get the disease under control. Thanks to careful treatment and observation. The girl finally made a full recovery. Everyone praised the doctor, but the girl was very worried about what the hospital bill would come to. Her family had some money in the bank that wasn't enough to pay for such a long treatment at this famous hospital. Finally, the girl received a hospital bill. She opened it with trembling hands. She was stunned to see that the bill had been crossed out and canceled with one from Dr. Kevin and there was a note underneath signed by Dr. Kevin:
"The bill was paid with a glass of milk many years ago!" 

Moral: A good move breeds the next.