A Customer is the most important person in the company...
In person or by mail.
A Customer is not dependent on us...
We are dependent on him.
A Customer is not an interruption of our work... He is the purpose of it.
We are not doing a favour by serving him... He is doing us a favour by giving us the opportunity to do so.
A Customer is not someone to argue or match wits with. Nobody ever won an argument with a customer.
A Customer is a person who brings us his wants. It is our job to handle them profitably to him and ourselves.