 अर्थिनः कार्यनिर्वृत्तिमकर्तुरपि यश्चरेत्।तस्य स्यात्सफलं जन्म किं पुनः पूर्वकारिणः।। 
  Our life becomes fruitful when we help a person who was not helped us. What to speak of returning the help one has rendered. 