Albert Lynd, quoted in Edward F. Murphy, The Crown Treasury of Relevant Quotations, 1978.

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.