According to Newton’s third law of motion, "to every action, there is an equal and opposite reaction." This principle applies to our karma and life as well.
We expect respect, love and cooperation from others but can’t get until we too have done so. Life is an echo. What you send out,
comes back. What you give, you get back. What you see in others, exists in you.
The theory of ‘give and take’ reminds me of a true story. Long time ago, there was a person belonging to a rich family and his car was stuck in a pit. He tried his best to pull out the car but failed.
A poor peasant was watching and he helped the person and the car was pulled out from the pit. The next day, the father of the rich person gave the peasant some money for his help. But the farmer refused to accept the money, saying it was his duty to help him.
An idea struck the mind of the rich man. He asked the peasant if he could take care of his son and provide him all the amenities for good education. The farmer thought for a while and accepted the offer.
The old man took good care of the poor child and sent him for best education. The child was brilliant and became a doctor. One day the only child of the rich man was diagnosed with some disease and there was no hope of his survival.
The doctor (earlier the poor child) tried his best to save the son of the rich man. He invented penicillin, which saved the life of his patient.
The doctor was Alexander Fleming who invented the life-saving drug and the person he saved was Winston Churchill who later became the prime minister of England.
That is why we say do good and have good. If we are good towards others and help people in whatever way we can, we too will get their help. Nothing goes unpaid.