a poor boy

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To finance his education, a poor boy sells door-to-door items. One day, this boy is really hungry but has no money to buy food. He decides to ask for something to eat when he knocks on the door in the next house.
A beautiful young woman opened the door, and the boy lost his courage. Finally he just asked to be given a glass of water, he was too embarrassed to ask for food. The young lady brought her a glass of milk, which the child drank ravenously.
The boy asked how much he owed. But the woman just smiled and said that her mother had taught her to be nice to others. And he never expected any reward.
The boy left the woman's home with a full stomach and a powerful new heart to continue her education and continue to work hard. But whenever he felt like quitting, he remembered the woman. Someone who has instilled a new belief and perseverance in him.
Years later, in a major city, a prominent surgeon Dr. Howard Kelly was called in to consult a middle-aged woman suffering from a rare disease. When the woman told him the name of the town where he lived, Dr. Kelly felt a faint memory appear in her mind. Then, suddenly the Doctor woke up. She was the woman who had given her a glass of milk years ago.
Then the doctor continues the consultation by providing the woman with the best care and making sure she gets special attention. In fact, he exerted all his ability as a doctor to save the woman's life.