I’m sure this has happened to you: You are in a store and purchase something with cash. When the clerk makes change, you realize that he has made a mistake and is giving you back more than the correct amount. Maybe it’s a dollar; maybe it’s ten dollars. What do you do? You could pocket the extra cash and walk out. No one would know. But, of course, that’s not what you do. Instead, you point out the error and return the extra money.
