Once there was a poor scottish farmer. One day, while working, he heard a cry for help from near by bog. He dropped his tools and ran to bog. There he saw a boy terrified and screaming stuck in bog up to waist. He was struggling to free himself. Farmer quickly acted and saved boy from that. Next day, a a fancy carriage pulled up to farmer's home. An elegant dressed nobleman stepped out and introduced himself as father of boy, whom farmer had saved previous day. Nobleman said, "I want to repay you. you saved my son's life.""No, I can't accept payment for what I did.", replied farmer and refused to accept anything in return. At that moment, farmer's son came to door. Seeing him, noble man asked, "Is that your son?""Yes", farmer replied. Nobleman said, "I will make you a deal. let me provide him with level of education my own son will enjoy. if he is anything like his father, then no doubt, he will grow to be man we both will be proud of. "And that what he did. Farmer's son attended the very best school and in time graduated from st. Mary's hospital medical school in london. He went on to become known throughout the world as noted - sir alexander fleming, the discoverer of penicillin. Years after the same nobleman's son was stricken with pneumonia. What saved his life this time was penicillin which was discovered by farmer's son. Name of nobleman was lord randolph churchill and his son was sir winston churchill who became a noted politicians and was prime minister of uk from 1940 to 1945. 
What goes around comes around. If you do good to others, it will come back to you. So, always do good to others. 