“Any seeming deception in a statement is costly, not only in the expense of the advertising but in the detrimental effect produced upon the customer, who believes she has been misled.”
John Wanamaker

“What are the three rules of advertising? Repetition, repetition, repetition.”
Al Reis

“Many a small thing has been made large by the right kind of advertising.”
Mark Twain

“If you make a product good enough even though you live in the depths of the forest, the public will make a path to your door, says the philosopher. But if you want the public in sufficient numbers, you'd better construct a highway. Advertising is that highway.”
William Hearst