"A customer is the most important person on our premises.
He is not dependent on us.
We are dependent on him.
He is not an interruption to our work.
He is the purpose of it.
He is not an outsider on our business.
He is part of it.
We are not doing him a favour by serving him.
He is doing us a favour by giving us an opportunity to do so."

Mahatma Gandhi (1869–1948)

"The customer may not always be right, but the customer is always the customer."

Mike Wills (1946–) - Managing the Training Process