Henny Youngman in Take My Book, Please told this story: A father was explaining ethics to his son, who was about to go into business. "Suppose a woman comes in and orders $100 worth of material. You wrap it up and give it to her. She pays you with a $100 bill. As she goes out the door you realize she has given you two $100 bills. Here’s where the ethics come in. Should you or shouldn’t you tell your partner?" Remember regularly and all the time that Jesus is here.