“I developed a theory of salesmanship based on the principle that one must not on any account identify oneself with the merchandise one is selling. Selling is a game where you score when you make a sale. If you allow your ego to be involved, the customer can brush you off and you lose; but if you do not identify yourself with your work you will be able to redouble your efforts when you are rejected, and if you make a sale you come out the winner.”