This is possibly the best way anyone has ever explained honesty. Definitely something that children need to be taught. If the adults don’t know it, then they should be taught as well. 
There is only one sin, only one. And that is theft. Every other sin is a variation of theft..
When you kill a man, you steal a life. You steal his wife’s right to a husband, rob his children of a father.
When you tell a lie, you steal someone’s right to the truth.
When you cheat, you steal the right to fairness.
When you kill a man, you steal a life. You steal his wife’s right to a husband, rob his children of a father.
When you tell a lie, you steal someone’s right to the truth.
When you cheat, you steal the right to fairness.
Quote from “Kite Runner”