A good advertising man is a first-class pragmatist. If he has any basic theorem at all, it is that most advertising is an intrusion upon the time and attention of people; a justifiable one but an intrusion nonetheless. The reader has bought the magazine for something other than the ads... Therefore the copywriters undertake to stop him in spite of himself.

As quoted in: The Crown Treasury of Relevant Quotations, 1978, p. 15.